Finding the Fourth Proportional to 112,947.16, 155,864.76 and 69,915.28

Step by Step Solution

1. Step 1: Write the proportion equation
   112,947.16 : 155,864.76 = 69,915.28 : x
2. Step 2: Convert to fraction form
   112,947.16/155,864.76 = 69,915.28/x
3. Step 3: Cross multiply
   112,947.16x = 155,864.76 × 69,915.28
4. Step 4: Simplify right side
   112,947.16x = 10,897,328,337.53
5. Step 5: Solve for x
   x = 10,897,328,337.53/112,947.16
6. Step 6: Final answer
   x = 96,481.65