Finding the Fourth Proportional to 1,099.86, 1,517.72 and 706.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.86 : 1,517.72 = 706.88 : x
2. Step 2: Convert to fraction form
   1,099.86/1,517.72 = 706.88/x
3. Step 3: Cross multiply
   1,099.86x = 1,517.72 × 706.88
4. Step 4: Simplify right side
   1,099.86x = 1,072,834.79
5. Step 5: Solve for x
   x = 1,072,834.79/1,099.86
6. Step 6: Final answer
   x = 975.43