Finding the Fourth Proportional to 56,608.66, 78,121.28 and 31,114.82

Step by Step Solution

1. Step 1: Write the proportion equation
   56,608.66 : 78,121.28 = 31,114.82 : x
2. Step 2: Convert to fraction form
   56,608.66/78,121.28 = 31,114.82/x
3. Step 3: Cross multiply
   56,608.66x = 78,121.28 × 31,114.82
4. Step 4: Simplify right side
   56,608.66x = 2,430,729,565.37
5. Step 5: Solve for x
   x = 2,430,729,565.37/56,608.66
6. Step 6: Final answer
   x = 42,939.18