Finding the Fourth Proportional to 160,978.08, 222,139.28 and 89,358.12

Step by Step Solution

1. Step 1: Write the proportion equation
   160,978.08 : 222,139.28 = 89,358.12 : x
2. Step 2: Convert to fraction form
   160,978.08/222,139.28 = 89,358.12/x
3. Step 3: Cross multiply
   160,978.08x = 222,139.28 × 89,358.12
4. Step 4: Simplify right side
   160,978.08x = 19,849,948,438.95
5. Step 5: Solve for x
   x = 19,849,948,438.95/160,978.08
6. Step 6: Final answer
   x = 123,308.39