Finding the Fourth Proportional to 257,012.52, 354,665.16 and 142,283.04

Step by Step Solution

1. Step 1: Write the proportion equation
   257,012.52 : 354,665.16 = 142,283.04 : x
2. Step 2: Convert to fraction form
   257,012.52/354,665.16 = 142,283.04/x
3. Step 3: Cross multiply
   257,012.52x = 354,665.16 × 142,283.04
4. Step 4: Simplify right side
   257,012.52x = 50,462,837,146.89
5. Step 5: Solve for x
   x = 50,462,837,146.89/257,012.52
6. Step 6: Final answer
   x = 196,343.89