Finding the Fourth Proportional to 129,411.96, 178,581.69 and 72,826.98

Step by Step Solution

1. Step 1: Write the proportion equation
   129,411.96 : 178,581.69 = 72,826.98 : x
2. Step 2: Convert to fraction form
   129,411.96/178,581.69 = 72,826.98/x
3. Step 3: Cross multiply
   129,411.96x = 178,581.69 × 72,826.98
4. Step 4: Simplify right side
   129,411.96x = 13,005,565,166.00
5. Step 5: Solve for x
   x = 13,005,565,166.00/129,411.96
6. Step 6: Final answer
   x = 100,497.40