Finding the Fourth Proportional to 257,155.32, 354,866.22 and 142,437.72

Step by Step Solution

1. Step 1: Write the proportion equation
   257,155.32 : 354,866.22 = 142,437.72 : x
2. Step 2: Convert to fraction form
   257,155.32/354,866.22 = 142,437.72/x
3. Step 3: Cross multiply
   257,155.32x = 354,866.22 × 142,437.72
4. Step 4: Simplify right side
   257,155.32x = 50,546,335,281.82
5. Step 5: Solve for x
   x = 50,546,335,281.82/257,155.32
6. Step 6: Final answer
   x = 196,559.56