Finding the Fourth Proportional to 112,643.52, 155,482.68 and 64,928.76

Step by Step Solution

1. Step 1: Write the proportion equation
   112,643.52 : 155,482.68 = 64,928.76 : x
2. Step 2: Convert to fraction form
   112,643.52/155,482.68 = 64,928.76/x
3. Step 3: Cross multiply
   112,643.52x = 155,482.68 × 64,928.76
4. Step 4: Simplify right side
   112,643.52x = 10,095,297,613.88
5. Step 5: Solve for x
   x = 10,095,297,613.88/112,643.52
6. Step 6: Final answer
   x = 89,621.65