Finding the Fourth Proportional to 1,100.16, 1,518.71 and 707.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.16 : 1,518.71 = 707.72 : x
2. Step 2: Convert to fraction form
   1,100.16/1,518.71 = 707.72/x
3. Step 3: Cross multiply
   1,100.16x = 1,518.71 × 707.72
4. Step 4: Simplify right side
   1,100.16x = 1,074,810.31
5. Step 5: Solve for x
   x = 1,074,810.31/1,100.16
6. Step 6: Final answer
   x = 976.96