Finding the Fourth Proportional to 261,333,234.72, 392,058,908.52 and 86,455,858.48

Step by Step Solution

1. Step 1: Write the proportion equation
   261,333,234.72 : 392,058,908.52 = 86,455,858.48 : x
2. Step 2: Convert to fraction form
   261,333,234.72/392,058,908.52 = 86,455,858.48/x
3. Step 3: Cross multiply
   261,333,234.72x = 392,058,908.52 × 86,455,858.48
4. Step 4: Simplify right side
   261,333,234.72x = 33,895,789,510,828,388
5. Step 5: Solve for x
   x = 33,895,789,510,828,388/261,333,234.72
6. Step 6: Final answer
   x = 129,703,325.13