Finding the Fourth Proportional to 142,128.75, 213,327.18 and 104,574.45

Step by Step Solution

1. Step 1: Write the proportion equation
   142,128.75 : 213,327.18 = 104,574.45 : x
2. Step 2: Convert to fraction form
   142,128.75/213,327.18 = 104,574.45/x
3. Step 3: Cross multiply
   142,128.75x = 213,327.18 × 104,574.45
4. Step 4: Simplify right side
   142,128.75x = 22,308,572,518.55
5. Step 5: Solve for x
   x = 22,308,572,518.55/142,128.75
6. Step 6: Final answer
   x = 156,960.31