Finding the Fourth Proportional to 56,280.72, 78,022.56 and 53,284.56

Step by Step Solution

1. Step 1: Write the proportion equation
   56,280.72 : 78,022.56 = 53,284.56 : x
2. Step 2: Convert to fraction form
   56,280.72/78,022.56 = 53,284.56/x
3. Step 3: Cross multiply
   56,280.72x = 78,022.56 × 53,284.56
4. Step 4: Simplify right side
   56,280.72x = 4,157,397,779.67
5. Step 5: Solve for x
   x = 4,157,397,779.67/56,280.72
6. Step 6: Final answer
   x = 73,868.95