Finding the Fourth Proportional to 561,338,978.50, 774,561,732.12 and 323,138,119.06

Step by Step Solution

1. Step 1: Write the proportion equation
   561,338,978.50 : 774,561,732.12 = 323,138,119.06 : x
2. Step 2: Convert to fraction form
   561,338,978.50/774,561,732.12 = 323,138,119.06/x
3. Step 3: Cross multiply
   561,338,978.50x = 774,561,732.12 × 323,138,119.06
4. Step 4: Simplify right side
   561,338,978.50x = 250,290,421,213,112,384
5. Step 5: Solve for x
   x = 250,290,421,213,112,384/561,338,978.50
6. Step 6: Final answer
   x = 445,881,064.38