Finding the Fourth Proportional to 56,728.53, 85,131.06 and 42,698.92

Step by Step Solution

1. Step 1: Write the proportion equation
   56,728.53 : 85,131.06 = 42,698.92 : x
2. Step 2: Convert to fraction form
   56,728.53/85,131.06 = 42,698.92/x
3. Step 3: Cross multiply
   56,728.53x = 85,131.06 × 42,698.92
4. Step 4: Simplify right side
   56,728.53x = 3,635,004,320.46
5. Step 5: Solve for x
   x = 3,635,004,320.46/56,728.53
6. Step 6: Final answer
   x = 64,077.18