Finding the Fourth Proportional to 1,097.69, 1,513.40 and 783.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,097.69 : 1,513.40 = 783.32 : x
2. Step 2: Convert to fraction form
   1,097.69/1,513.40 = 783.32/x
3. Step 3: Cross multiply
   1,097.69x = 1,513.40 × 783.32
4. Step 4: Simplify right side
   1,097.69x = 1,185,465.00
5. Step 5: Solve for x
   x = 1,185,465.00/1,097.69
6. Step 6: Final answer
   x = 1,079.97