Finding the Fourth Proportional to 123,021.57, 169,770.15 and 71,348.70

Step by Step Solution

1. Step 1: Write the proportion equation
   123,021.57 : 169,770.15 = 71,348.70 : x
2. Step 2: Convert to fraction form
   123,021.57/169,770.15 = 71,348.70/x
3. Step 3: Cross multiply
   123,021.57x = 169,770.15 × 71,348.70
4. Step 4: Simplify right side
   123,021.57x = 12,112,879,501.31
5. Step 5: Solve for x
   x = 12,112,879,501.31/123,021.57
6. Step 6: Final answer
   x = 98,461.43