Finding the Fourth Proportional to 57,209.35, 78,941.59 and 31,715.48

Step by Step Solution

1. Step 1: Write the proportion equation
   57,209.35 : 78,941.59 = 31,715.48 : x
2. Step 2: Convert to fraction form
   57,209.35/78,941.59 = 31,715.48/x
3. Step 3: Cross multiply
   57,209.35x = 78,941.59 × 31,715.48
4. Step 4: Simplify right side
   57,209.35x = 2,503,669,944.82
5. Step 5: Solve for x
   x = 2,503,669,944.82/57,209.35
6. Step 6: Final answer
   x = 43,763.30