Finding the Fourth Proportional to 129,321, 178,462.98 and 72,733.59

Step by Step Solution

1. Step 1: Write the proportion equation
   129,321 : 178,462.98 = 72,733.59 : x
2. Step 2: Convert to fraction form
   129,321/178,462.98 = 72,733.59/x
3. Step 3: Cross multiply
   129,321x = 178,462.98 × 72,733.59
4. Step 4: Simplify right side
   129,321x = 12,980,253,217.50
5. Step 5: Solve for x
   x = 12,980,253,217.50/129,321
6. Step 6: Final answer
   x = 100,372.35