Finding the Fourth Proportional to 114,990.43, 158,686.54 and 64,689.43

Step by Step Solution

1. Step 1: Write the proportion equation
   114,990.43 : 158,686.54 = 64,689.43 : x
2. Step 2: Convert to fraction form
   114,990.43/158,686.54 = 64,689.43/x
3. Step 3: Cross multiply
   114,990.43x = 158,686.54 × 64,689.43
4. Step 4: Simplify right side
   114,990.43x = 10,265,341,821.27
5. Step 5: Solve for x
   x = 10,265,341,821.27/114,990.43
6. Step 6: Final answer
   x = 89,271.27