Finding the Fourth Proportional to 112,512.27, 155,193.78 and 72,162.12

Step by Step Solution

1. Step 1: Write the proportion equation
   112,512.27 : 155,193.78 = 72,162.12 : x
2. Step 2: Convert to fraction form
   112,512.27/155,193.78 = 72,162.12/x
3. Step 3: Cross multiply
   112,512.27x = 155,193.78 × 72,162.12
4. Step 4: Simplify right side
   112,512.27x = 11,199,112,175.61
5. Step 5: Solve for x
   x = 11,199,112,175.61/112,512.27
6. Step 6: Final answer
   x = 99,536.81