Finding the Fourth Proportional to 142,645.30, 213,782.38 and 58,309.04

Step by Step Solution

1. Step 1: Write the proportion equation
   142,645.30 : 213,782.38 = 58,309.04 : x
2. Step 2: Convert to fraction form
   142,645.30/213,782.38 = 58,309.04/x
3. Step 3: Cross multiply
   142,645.30x = 213,782.38 × 58,309.04
4. Step 4: Simplify right side
   142,645.30x = 12,465,445,346.72
5. Step 5: Solve for x
   x = 12,465,445,346.72/142,645.30
6. Step 6: Final answer
   x = 87,387.70