Finding the Fourth Proportional to 1,097.61, 1,515.69 and 1,021.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,097.61 : 1,515.69 = 1,021.07 : x
2. Step 2: Convert to fraction form
   1,097.61/1,515.69 = 1,021.07/x
3. Step 3: Cross multiply
   1,097.61x = 1,515.69 × 1,021.07
4. Step 4: Simplify right side
   1,097.61x = 1,547,625.59
5. Step 5: Solve for x
   x = 1,547,625.59/1,097.61
6. Step 6: Final answer
   x = 1,410.00