Finding the Fourth Proportional to 12,069,796.20, 18,107,901.90 and 5,243,440.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,069,796.20 : 18,107,901.90 = 5,243,440.20 : x
2. Step 2: Convert to fraction form
   12,069,796.20/18,107,901.90 = 5,243,440.20/x
3. Step 3: Cross multiply
   12,069,796.20x = 18,107,901.90 × 5,243,440.20
4. Step 4: Simplify right side
   12,069,796.20x = 94,947,700,760,116.38
5. Step 5: Solve for x
   x = 94,947,700,760,116.38/12,069,796.20
6. Step 6: Final answer
   x = 7,866,553.77