Finding the Fourth Proportional to 1,100.17, 1,518.31 and 707.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.17 : 1,518.31 = 707.12 : x
2. Step 2: Convert to fraction form
   1,100.17/1,518.31 = 707.12/x
3. Step 3: Cross multiply
   1,100.17x = 1,518.31 × 707.12
4. Step 4: Simplify right side
   1,100.17x = 1,073,627.37
5. Step 5: Solve for x
   x = 1,073,627.37/1,100.17
6. Step 6: Final answer
   x = 975.87