Finding the Fourth Proportional to 112,719.20, 155,550.56 and 62,417.12

Step by Step Solution

1. Step 1: Write the proportion equation
   112,719.20 : 155,550.56 = 62,417.12 : x
2. Step 2: Convert to fraction form
   112,719.20/155,550.56 = 62,417.12/x
3. Step 3: Cross multiply
   112,719.20x = 155,550.56 × 62,417.12
4. Step 4: Simplify right side
   112,719.20x = 9,709,017,969.59
5. Step 5: Solve for x
   x = 9,709,017,969.59/112,719.20
6. Step 6: Final answer
   x = 86,134.55