Finding the Fourth Proportional to 238,123.40, 357,198.78 and 86,353.52

Step by Step Solution

1. Step 1: Write the proportion equation
   238,123.40 : 357,198.78 = 86,353.52 : x
2. Step 2: Convert to fraction form
   238,123.40/357,198.78 = 86,353.52/x
3. Step 3: Cross multiply
   238,123.40x = 357,198.78 × 86,353.52
4. Step 4: Simplify right side
   238,123.40x = 30,845,371,992.71
5. Step 5: Solve for x
   x = 30,845,371,992.71/238,123.40
6. Step 6: Final answer
   x = 129,535.24