Finding the Fourth Proportional to 355,786.02, 533,766.51 and 142,568.10

Step by Step Solution

1. Step 1: Write the proportion equation
   355,786.02 : 533,766.51 = 142,568.10 : x
2. Step 2: Convert to fraction form
   355,786.02/533,766.51 = 142,568.10/x
3. Step 3: Cross multiply
   355,786.02x = 533,766.51 × 142,568.10
4. Step 4: Simplify right side
   355,786.02x = 76,098,077,174.33
5. Step 5: Solve for x
   x = 76,098,077,174.33/355,786.02
6. Step 6: Final answer
   x = 213,887.20