Finding the Fourth Proportional to 1,097.15, 1,513.55 and 654.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,097.15 : 1,513.55 = 654.80 : x
2. Step 2: Convert to fraction form
   1,097.15/1,513.55 = 654.80/x
3. Step 3: Cross multiply
   1,097.15x = 1,513.55 × 654.80
4. Step 4: Simplify right side
   1,097.15x = 991,066.61
5. Step 5: Solve for x
   x = 991,066.61/1,097.15
6. Step 6: Final answer
   x = 903.31