Finding the Fourth Proportional to 129,573.52, 178,804.56 and 72,981.25

Step by Step Solution

1. Step 1: Write the proportion equation
   129,573.52 : 178,804.56 = 72,981.25 : x
2. Step 2: Convert to fraction form
   129,573.52/178,804.56 = 72,981.25/x
3. Step 3: Cross multiply
   129,573.52x = 178,804.56 × 72,981.25
4. Step 4: Simplify right side
   129,573.52x = 13,049,380,294.50
5. Step 5: Solve for x
   x = 13,049,380,294.50/129,573.52
6. Step 6: Final answer
   x = 100,710.24