Finding the Fourth Proportional to 131,298,670, 181,192,726.80 and 71,761,168.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131,298,670 : 181,192,726.80 = 71,761,168.72 : x
2. Step 2: Convert to fraction form
   131,298,670/181,192,726.80 = 71,761,168.72/x
3. Step 3: Cross multiply
   131,298,670x = 181,192,726.80 × 71,761,168.72
4. Step 4: Simplify right side
   131,298,670x = 13,002,601,838,731,666
5. Step 5: Solve for x
   x = 13,002,601,838,731,666/131,298,670
6. Step 6: Final answer
   x = 99,030,720.10