Finding the Fourth Proportional to 56,284.72, 78,028.11 and 53,288.56

Step by Step Solution

1. Step 1: Write the proportion equation
   56,284.72 : 78,028.11 = 53,288.56 : x
2. Step 2: Convert to fraction form
   56,284.72/78,028.11 = 53,288.56/x
3. Step 3: Cross multiply
   56,284.72x = 78,028.11 × 53,288.56
4. Step 4: Simplify right side
   56,284.72x = 4,158,005,621.42
5. Step 5: Solve for x
   x = 4,158,005,621.42/56,284.72
6. Step 6: Final answer
   x = 73,874.50