Finding the Fourth Proportional to 154,381, 213,045.78 and 83,725

Step by Step Solution

1. Step 1: Write the proportion equation
   154,381 : 213,045.78 = 83,725 : x
2. Step 2: Convert to fraction form
   154,381/213,045.78 = 83,725/x
3. Step 3: Cross multiply
   154,381x = 213,045.78 × 83,725
4. Step 4: Simplify right side
   154,381x = 17,837,257,930.50
5. Step 5: Solve for x
   x = 17,837,257,930.50/154,381
6. Step 6: Final answer
   x = 115,540.50