Finding the Fourth Proportional to 129,112.48, 178,196.52 and 75,397.06

Step by Step Solution

1. Step 1: Write the proportion equation
   129,112.48 : 178,196.52 = 75,397.06 : x
2. Step 2: Convert to fraction form
   129,112.48/178,196.52 = 75,397.06/x
3. Step 3: Cross multiply
   129,112.48x = 178,196.52 × 75,397.06
4. Step 4: Simplify right side
   129,112.48x = 13,435,493,710.23
5. Step 5: Solve for x
   x = 13,435,493,710.23/129,112.48
6. Step 6: Final answer
   x = 104,060.38