Finding the Fourth Proportional to 1,308.69, 1,806.17 and 784.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.69 : 1,806.17 = 784.76 : x
2. Step 2: Convert to fraction form
   1,308.69/1,806.17 = 784.76/x
3. Step 3: Cross multiply
   1,308.69x = 1,806.17 × 784.76
4. Step 4: Simplify right side
   1,308.69x = 1,417,397.01
5. Step 5: Solve for x
   x = 1,417,397.01/1,308.69
6. Step 6: Final answer
   x = 1,083.07