Finding the Fourth Proportional to 57,200.56, 78,849.27 and 40,156.99

Step by Step Solution

1. Step 1: Write the proportion equation
   57,200.56 : 78,849.27 = 40,156.99 : x
2. Step 2: Convert to fraction form
   57,200.56/78,849.27 = 40,156.99/x
3. Step 3: Cross multiply
   57,200.56x = 78,849.27 × 40,156.99
4. Step 4: Simplify right side
   57,200.56x = 3,166,349,149.77
5. Step 5: Solve for x
   x = 3,166,349,149.77/57,200.56
6. Step 6: Final answer
   x = 55,355.21