Finding the Fourth Proportional to 234,128.56, 323,062.64 and 142,200

Step by Step Solution

1. Step 1: Write the proportion equation
   234,128.56 : 323,062.64 = 142,200 : x
2. Step 2: Convert to fraction form
   234,128.56/323,062.64 = 142,200/x
3. Step 3: Cross multiply
   234,128.56x = 323,062.64 × 142,200
4. Step 4: Simplify right side
   234,128.56x = 45,939,507,763.50
5. Step 5: Solve for x
   x = 45,939,507,763.50/234,128.56
6. Step 6: Final answer
   x = 196,214.88