Finding the Fourth Proportional to 128,892.52, 177,870.90 and 75,173.32

Step by Step Solution

1. Step 1: Write the proportion equation
   128,892.52 : 177,870.90 = 75,173.32 : x
2. Step 2: Convert to fraction form
   128,892.52/177,870.90 = 75,173.32/x
3. Step 3: Cross multiply
   128,892.52x = 177,870.90 × 75,173.32
4. Step 4: Simplify right side
   128,892.52x = 13,371,146,084.39
5. Step 5: Solve for x
   x = 13,371,146,084.39/128,892.52
6. Step 6: Final answer
   x = 103,738.73