Finding the Fourth Proportional to 78,490.16, 108,315.84 and 42,680.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,490.16 : 108,315.84 = 42,680.16 : x
2. Step 2: Convert to fraction form
   78,490.16/108,315.84 = 42,680.16/x
3. Step 3: Cross multiply
   78,490.16x = 108,315.84 × 42,680.16
4. Step 4: Simplify right side
   78,490.16x = 4,622,937,381.73
5. Step 5: Solve for x
   x = 4,622,937,381.73/78,490.16
6. Step 6: Final answer
   x = 58,898.30