Finding the Fourth Proportional to 1,109.10, 1,531.05 and 716.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.10 : 1,531.05 = 716.32 : x
2. Step 2: Convert to fraction form
   1,109.10/1,531.05 = 716.32/x
3. Step 3: Cross multiply
   1,109.10x = 1,531.05 × 716.32
4. Step 4: Simplify right side
   1,109.10x = 1,096,714.08
5. Step 5: Solve for x
   x = 1,096,714.08/1,109.10
6. Step 6: Final answer
   x = 988.83