Finding the Fourth Proportional to 131,590.88, 181,612.72 and 74,989.28

Step by Step Solution

1. Step 1: Write the proportion equation
   131,590.88 : 181,612.72 = 74,989.28 : x
2. Step 2: Convert to fraction form
   131,590.88/181,612.72 = 74,989.28/x
3. Step 3: Cross multiply
   131,590.88x = 181,612.72 × 74,989.28
4. Step 4: Simplify right side
   131,590.88x = 13,619,007,111.64
5. Step 5: Solve for x
   x = 13,619,007,111.64/131,590.88
6. Step 6: Final answer
   x = 103,495.07