Finding the Fourth Proportional to 63,988, 88,443.28 and 56,376.16

Step by Step Solution

1. Step 1: Write the proportion equation
   63,988 : 88,443.28 = 56,376.16 : x
2. Step 2: Convert to fraction form
   63,988/88,443.28 = 56,376.16/x
3. Step 3: Cross multiply
   63,988x = 88,443.28 × 56,376.16
4. Step 4: Simplify right side
   63,988x = 4,986,092,504.20
5. Step 5: Solve for x
   x = 4,986,092,504.20/63,988
6. Step 6: Final answer
   x = 77,922.31