Finding the Fourth Proportional to 112,411.64, 155,200.38 and 72,142.76

Step by Step Solution

1. Step 1: Write the proportion equation
   112,411.64 : 155,200.38 = 72,142.76 : x
2. Step 2: Convert to fraction form
   112,411.64/155,200.38 = 72,142.76/x
3. Step 3: Cross multiply
   112,411.64x = 155,200.38 × 72,142.76
4. Step 4: Simplify right side
   112,411.64x = 11,196,583,766.25
5. Step 5: Solve for x
   x = 11,196,583,766.25/112,411.64
6. Step 6: Final answer
   x = 99,603.42