Finding the Fourth Proportional to 112,570.43, 155,313.69 and 64,822.55

Step by Step Solution

1. Step 1: Write the proportion equation
   112,570.43 : 155,313.69 = 64,822.55 : x
2. Step 2: Convert to fraction form
   112,570.43/155,313.69 = 64,822.55/x
3. Step 3: Cross multiply
   112,570.43x = 155,313.69 × 64,822.55
4. Step 4: Simplify right side
   112,570.43x = 10,067,829,435.71
5. Step 5: Solve for x
   x = 10,067,829,435.71/112,570.43
6. Step 6: Final answer
   x = 89,435.83