Finding the Fourth Proportional to 129,064.68, 178,080.32 and 72,472.41

Step by Step Solution

1. Step 1: Write the proportion equation
   129,064.68 : 178,080.32 = 72,472.41 : x
2. Step 2: Convert to fraction form
   129,064.68/178,080.32 = 72,472.41/x
3. Step 3: Cross multiply
   129,064.68x = 178,080.32 × 72,472.41
4. Step 4: Simplify right side
   129,064.68x = 12,905,910,145.15
5. Step 5: Solve for x
   x = 12,905,910,145.15/129,064.68
6. Step 6: Final answer
   x = 99,995.68