Finding the Fourth Proportional to 2,101.55, 3,152.37 and 947.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.55 : 3,152.37 = 947.30 : x
2. Step 2: Convert to fraction form
   2,101.55/3,152.37 = 947.30/x
3. Step 3: Cross multiply
   2,101.55x = 3,152.37 × 947.30
4. Step 4: Simplify right side
   2,101.55x = 2,986,240.10
5. Step 5: Solve for x
   x = 2,986,240.10/2,101.55
6. Step 6: Final answer
   x = 1,420.97