Finding the Fourth Proportional to 57,121.34, 78,830.38 and 31,630.49

Step by Step Solution

1. Step 1: Write the proportion equation
   57,121.34 : 78,830.38 = 31,630.49 : x
2. Step 2: Convert to fraction form
   57,121.34/78,830.38 = 31,630.49/x
3. Step 3: Cross multiply
   57,121.34x = 78,830.38 × 31,630.49
4. Step 4: Simplify right side
   57,121.34x = 2,493,443,546.29
5. Step 5: Solve for x
   x = 2,493,443,546.29/57,121.34
6. Step 6: Final answer
   x = 43,651.70