Finding the Fourth Proportional to 83,453.39, 125,180.17 and 21,123.89

Step by Step Solution

1. Step 1: Write the proportion equation
   83,453.39 : 125,180.17 = 21,123.89 : x
2. Step 2: Convert to fraction form
   83,453.39/125,180.17 = 21,123.89/x
3. Step 3: Cross multiply
   83,453.39x = 125,180.17 × 21,123.89
4. Step 4: Simplify right side
   83,453.39x = 2,644,292,141.26
5. Step 5: Solve for x
   x = 2,644,292,141.26/83,453.39
6. Step 6: Final answer
   x = 31,685.86