Finding the Fourth Proportional to 67,256.57, 92,141.90 and 64,734.23

Step by Step Solution

1. Step 1: Write the proportion equation
   67,256.57 : 92,141.90 = 64,734.23 : x
2. Step 2: Convert to fraction form
   67,256.57/92,141.90 = 64,734.23/x
3. Step 3: Cross multiply
   67,256.57x = 92,141.90 × 64,734.23
4. Step 4: Simplify right side
   67,256.57x = 5,964,734,162.86
5. Step 5: Solve for x
   x = 5,964,734,162.86/67,256.57
6. Step 6: Final answer
   x = 88,686.27