Finding the Fourth Proportional to 112,568.43, 155,310.93 and 64,820.55

Step by Step Solution

1. Step 1: Write the proportion equation
   112,568.43 : 155,310.93 = 64,820.55 : x
2. Step 2: Convert to fraction form
   112,568.43/155,310.93 = 64,820.55/x
3. Step 3: Cross multiply
   112,568.43x = 155,310.93 × 64,820.55
4. Step 4: Simplify right side
   112,568.43x = 10,067,339,903.61
5. Step 5: Solve for x
   x = 10,067,339,903.61/112,568.43
6. Step 6: Final answer
   x = 89,433.07