Finding the Fourth Proportional to 154,448.28, 213,028.72 and 141,742.50

Step by Step Solution

1. Step 1: Write the proportion equation
   154,448.28 : 213,028.72 = 141,742.50 : x
2. Step 2: Convert to fraction form
   154,448.28/213,028.72 = 141,742.50/x
3. Step 3: Cross multiply
   154,448.28x = 213,028.72 × 141,742.50
4. Step 4: Simplify right side
   154,448.28x = 30,195,223,344.60
5. Step 5: Solve for x
   x = 30,195,223,344.60/154,448.28
6. Step 6: Final answer
   x = 195,503.79