Finding the Fourth Proportional to 112,404.71, 155,113.90 and 61,419.20

Step by Step Solution

1. Step 1: Write the proportion equation
   112,404.71 : 155,113.90 = 61,419.20 : x
2. Step 2: Convert to fraction form
   112,404.71/155,113.90 = 61,419.20/x
3. Step 3: Cross multiply
   112,404.71x = 155,113.90 × 61,419.20
4. Step 4: Simplify right side
   112,404.71x = 9,526,970,717.76
5. Step 5: Solve for x
   x = 9,526,970,717.76/112,404.71
6. Step 6: Final answer
   x = 84,755.97