Finding the Fourth Proportional to 57,243.59, 78,904.89 and 45,124.31

Step by Step Solution

1. Step 1: Write the proportion equation
   57,243.59 : 78,904.89 = 45,124.31 : x
2. Step 2: Convert to fraction form
   57,243.59/78,904.89 = 45,124.31/x
3. Step 3: Cross multiply
   57,243.59x = 78,904.89 × 45,124.31
4. Step 4: Simplify right side
   57,243.59x = 3,560,528,727.28
5. Step 5: Solve for x
   x = 3,560,528,727.28/57,243.59
6. Step 6: Final answer
   x = 62,199.60