Finding the Fourth Proportional to 112,425.64, 155,219.72 and 72,156.76

Step by Step Solution

1. Step 1: Write the proportion equation
   112,425.64 : 155,219.72 = 72,156.76 : x
2. Step 2: Convert to fraction form
   112,425.64/155,219.72 = 72,156.76/x
3. Step 3: Cross multiply
   112,425.64x = 155,219.72 × 72,156.76
4. Step 4: Simplify right side
   112,425.64x = 11,200,152,083.31
5. Step 5: Solve for x
   x = 11,200,152,083.31/112,425.64
6. Step 6: Final answer
   x = 99,622.76