Finding the Fourth Proportional to 202,196.20, 279,034.32 and 111,557.20

Step by Step Solution

1. Step 1: Write the proportion equation
   202,196.20 : 279,034.32 = 111,557.20 : x
2. Step 2: Convert to fraction form
   202,196.20/279,034.32 = 111,557.20/x
3. Step 3: Cross multiply
   202,196.20x = 279,034.32 × 111,557.20
4. Step 4: Simplify right side
   202,196.20x = 31,128,287,443.10
5. Step 5: Solve for x
   x = 31,128,287,443.10/202,196.20
6. Step 6: Final answer
   x = 153,950.90