Finding the Fourth Proportional to 56,282.72, 78,025.34 and 53,286.56

Step by Step Solution

1. Step 1: Write the proportion equation
   56,282.72 : 78,025.34 = 53,286.56 : x
2. Step 2: Convert to fraction form
   56,282.72/78,025.34 = 53,286.56/x
3. Step 3: Cross multiply
   56,282.72x = 78,025.34 × 53,286.56
4. Step 4: Simplify right side
   56,282.72x = 4,157,701,961.43
5. Step 5: Solve for x
   x = 4,157,701,961.43/56,282.72
6. Step 6: Final answer
   x = 73,871.73