Finding the Fourth Proportional to 57,039.94, 78,715.66 and 31,545

Step by Step Solution

1. Step 1: Write the proportion equation
   57,039.94 : 78,715.66 = 31,545 : x
2. Step 2: Convert to fraction form
   57,039.94/78,715.66 = 31,545/x
3. Step 3: Cross multiply
   57,039.94x = 78,715.66 × 31,545
4. Step 4: Simplify right side
   57,039.94x = 2,483,085,494.70
5. Step 5: Solve for x
   x = 2,483,085,494.70/57,039.94
6. Step 6: Final answer
   x = 43,532.40