Finding the Fourth Proportional to 142,440.04, 213,581.21 and 58,259.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,440.04 : 213,581.21 = 58,259.30 : x
2. Step 2: Convert to fraction form
   142,440.04/213,581.21 = 58,259.30/x
3. Step 3: Cross multiply
   142,440.04x = 213,581.21 × 58,259.30
4. Step 4: Simplify right side
   142,440.04x = 12,443,091,496.46
5. Step 5: Solve for x
   x = 12,443,091,496.46/142,440.04
6. Step 6: Final answer
   x = 87,356.70