Finding the Fourth Proportional to 56,710.68, 78,129.72 and 40,767.56

Step by Step Solution

1. Step 1: Write the proportion equation
   56,710.68 : 78,129.72 = 40,767.56 : x
2. Step 2: Convert to fraction form
   56,710.68/78,129.72 = 40,767.56/x
3. Step 3: Cross multiply
   56,710.68x = 78,129.72 × 40,767.56
4. Step 4: Simplify right side
   56,710.68x = 3,185,158,047.88
5. Step 5: Solve for x
   x = 3,185,158,047.88/56,710.68
6. Step 6: Final answer
   x = 56,165.05