Finding the Fourth Proportional to 112,718.59, 155,550.17 and 64,319.37

Step by Step Solution

1. Step 1: Write the proportion equation
   112,718.59 : 155,550.17 = 64,319.37 : x
2. Step 2: Convert to fraction form
   112,718.59/155,550.17 = 64,319.37/x
3. Step 3: Cross multiply
   112,718.59x = 155,550.17 × 64,319.37
4. Step 4: Simplify right side
   112,718.59x = 10,004,888,515.28
5. Step 5: Solve for x
   x = 10,004,888,515.28/112,718.59
6. Step 6: Final answer
   x = 88,759.88