Finding the Fourth Proportional to 1,099.54, 1,517.40 and 707.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.54 : 1,517.40 = 707.10 : x
2. Step 2: Convert to fraction form
   1,099.54/1,517.40 = 707.10/x
3. Step 3: Cross multiply
   1,099.54x = 1,517.40 × 707.10
4. Step 4: Simplify right side
   1,099.54x = 1,072,953.54
5. Step 5: Solve for x
   x = 1,072,953.54/1,099.54
6. Step 6: Final answer
   x = 975.82