Finding the Fourth Proportional to 56,016.16, 77,305.76 and 30,865.60

Step by Step Solution

1. Step 1: Write the proportion equation
   56,016.16 : 77,305.76 = 30,865.60 : x
2. Step 2: Convert to fraction form
   56,016.16/77,305.76 = 30,865.60/x
3. Step 3: Cross multiply
   56,016.16x = 77,305.76 × 30,865.60
4. Step 4: Simplify right side
   56,016.16x = 2,386,088,665.86
5. Step 5: Solve for x
   x = 2,386,088,665.86/56,016.16
6. Step 6: Final answer
   x = 42,596.43