Finding the Fourth Proportional to 112,715.59, 155,509.75 and 64,967.91

Step by Step Solution

1. Step 1: Write the proportion equation
   112,715.59 : 155,509.75 = 64,967.91 : x
2. Step 2: Convert to fraction form
   112,715.59/155,509.75 = 64,967.91/x
3. Step 3: Cross multiply
   112,715.59x = 155,509.75 × 64,967.91
4. Step 4: Simplify right side
   112,715.59x = 10,103,143,279.70
5. Step 5: Solve for x
   x = 10,103,143,279.70/112,715.59
6. Step 6: Final answer
   x = 89,633.95