Finding the Fourth Proportional to 1,380,443,973.56, 1,905,059,692.62 and 816,412,354.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380,443,973.56 : 1,905,059,692.62 = 816,412,354.28 : x
2. Step 2: Convert to fraction form
   1,380,443,973.56/1,905,059,692.62 = 816,412,354.28/x
3. Step 3: Cross multiply
   1,380,443,973.56x = 1,905,059,692.62 × 816,412,354.28
4. Step 4: Simplify right side
   1,380,443,973.56x = 1,555,314,268,695,827,200
5. Step 5: Solve for x
   x = 1,555,314,268,695,827,200/1,380,443,973.56
6. Step 6: Final answer
   x = 1,126,676,850.70