Finding the Fourth Proportional to 201,443.10, 302,261.85 and 142,151.10

Step by Step Solution

1. Step 1: Write the proportion equation
   201,443.10 : 302,261.85 = 142,151.10 : x
2. Step 2: Convert to fraction form
   201,443.10/302,261.85 = 142,151.10/x
3. Step 3: Cross multiply
   201,443.10x = 302,261.85 × 142,151.10
4. Step 4: Simplify right side
   201,443.10x = 42,966,854,465.54
5. Step 5: Solve for x
   x = 42,966,854,465.54/201,443.10
6. Step 6: Final answer
   x = 213,295.24