Finding the Fourth Proportional to 78,113.16, 117,156.96 and 21,957.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,113.16 : 117,156.96 = 21,957.12 : x
2. Step 2: Convert to fraction form
   78,113.16/117,156.96 = 21,957.12/x
3. Step 3: Cross multiply
   78,113.16x = 117,156.96 × 21,957.12
4. Step 4: Simplify right side
   78,113.16x = 2,572,429,429.56
5. Step 5: Solve for x
   x = 2,572,429,429.56/78,113.16
6. Step 6: Final answer
   x = 32,932.09