Finding the Fourth Proportional to 131,428.39, 181,371 and 74,839.77

Step by Step Solution

1. Step 1: Write the proportion equation
   131,428.39 : 181,371 = 74,839.77 : x
2. Step 2: Convert to fraction form
   131,428.39/181,371 = 74,839.77/x
3. Step 3: Cross multiply
   131,428.39x = 181,371 × 74,839.77
4. Step 4: Simplify right side
   131,428.39x = 13,573,763,017.82
5. Step 5: Solve for x
   x = 13,573,763,017.82/131,428.39
6. Step 6: Final answer
   x = 103,278.77