Finding the Fourth Proportional to 1,434.91, 2,152.97 and 784.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.91 : 2,152.97 = 784.89 : x
2. Step 2: Convert to fraction form
   1,434.91/2,152.97 = 784.89/x
3. Step 3: Cross multiply
   1,434.91x = 2,152.97 × 784.89
4. Step 4: Simplify right side
   1,434.91x = 1,689,833.86
5. Step 5: Solve for x
   x = 1,689,833.86/1,434.91
6. Step 6: Final answer
   x = 1,177.66