Finding the Fourth Proportional to 56,856.56, 78,494.12 and 39,425.36

Step by Step Solution

1. Step 1: Write the proportion equation
   56,856.56 : 78,494.12 = 39,425.36 : x
2. Step 2: Convert to fraction form
   56,856.56/78,494.12 = 39,425.36/x
3. Step 3: Cross multiply
   56,856.56x = 78,494.12 × 39,425.36
4. Step 4: Simplify right side
   56,856.56x = 3,094,658,938.88
5. Step 5: Solve for x
   x = 3,094,658,938.88/56,856.56
6. Step 6: Final answer
   x = 54,429.23