Finding the Fourth Proportional to 142,420.20, 213,642.50 and 37,239

Step by Step Solution

1. Step 1: Write the proportion equation
   142,420.20 : 213,642.50 = 37,239 : x
2. Step 2: Convert to fraction form
   142,420.20/213,642.50 = 37,239/x
3. Step 3: Cross multiply
   142,420.20x = 213,642.50 × 37,239
4. Step 4: Simplify right side
   142,420.20x = 7,955,832,871.31
5. Step 5: Solve for x
   x = 7,955,832,871.31/142,420.20
6. Step 6: Final answer
   x = 55,861.69