Finding the Fourth Proportional to 353,016.34, 487,160.28 and 202,142.50

Step by Step Solution

1. Step 1: Write the proportion equation
   353,016.34 : 487,160.28 = 202,142.50 : x
2. Step 2: Convert to fraction form
   353,016.34/487,160.28 = 202,142.50/x
3. Step 3: Cross multiply
   353,016.34x = 487,160.28 × 202,142.50
4. Step 4: Simplify right side
   353,016.34x = 98,475,796,899.90
5. Step 5: Solve for x
   x = 98,475,796,899.90/353,016.34
6. Step 6: Final answer
   x = 278,955.35