Finding the Fourth Proportional to 2,101.50, 3,153.60 and 947.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.50 : 3,153.60 = 947.25 : x
2. Step 2: Convert to fraction form
   2,101.50/3,153.60 = 947.25/x
3. Step 3: Cross multiply
   2,101.50x = 3,153.60 × 947.25
4. Step 4: Simplify right side
   2,101.50x = 2,987,247.60
5. Step 5: Solve for x
   x = 2,987,247.60/2,101.50
6. Step 6: Final answer
   x = 1,421.48