Finding the Fourth Proportional to 56,743.32, 78,280.18 and 38,571.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,743.32 : 78,280.18 = 38,571.78 : x
2. Step 2: Convert to fraction form
   56,743.32/78,280.18 = 38,571.78/x
3. Step 3: Cross multiply
   56,743.32x = 78,280.18 × 38,571.78
4. Step 4: Simplify right side
   56,743.32x = 3,019,405,881.32
5. Step 5: Solve for x
   x = 3,019,405,881.32/56,743.32
6. Step 6: Final answer
   x = 53,211.65