Finding the Fourth Proportional to 89,445.12, 123,384.96 and 72,648.96

Step by Step Solution

1. Step 1: Write the proportion equation
   89,445.12 : 123,384.96 = 72,648.96 : x
2. Step 2: Convert to fraction form
   89,445.12/123,384.96 = 72,648.96/x
3. Step 3: Cross multiply
   89,445.12x = 123,384.96 × 72,648.96
4. Step 4: Simplify right side
   89,445.12x = 8,963,789,023.64
5. Step 5: Solve for x
   x = 8,963,789,023.64/89,445.12
6. Step 6: Final answer
   x = 100,215.52