Finding the Fourth Proportional to 235,196.66, 352,774.17 and 85,438.23

Step by Step Solution

1. Step 1: Write the proportion equation
   235,196.66 : 352,774.17 = 85,438.23 : x
2. Step 2: Convert to fraction form
   235,196.66/352,774.17 = 85,438.23/x
3. Step 3: Cross multiply
   235,196.66x = 352,774.17 × 85,438.23
4. Step 4: Simplify right side
   235,196.66x = 30,140,400,674.52
5. Step 5: Solve for x
   x = 30,140,400,674.52/235,196.66
6. Step 6: Final answer
   x = 128,149.78