Finding the Fourth Proportional to 1,434.79, 2,150.16 and 1,261.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.79 : 2,150.16 = 1,261.05 : x
2. Step 2: Convert to fraction form
   1,434.79/2,150.16 = 1,261.05/x
3. Step 3: Cross multiply
   1,434.79x = 2,150.16 × 1,261.05
4. Step 4: Simplify right side
   1,434.79x = 2,711,459.27
5. Step 5: Solve for x
   x = 2,711,459.27/1,434.79
6. Step 6: Final answer
   x = 1,889.80