Finding the Fourth Proportional to 1,070.27, 1,475.21 and 716.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070.27 : 1,475.21 = 716.07 : x
2. Step 2: Convert to fraction form
   1,070.27/1,475.21 = 716.07/x
3. Step 3: Cross multiply
   1,070.27x = 1,475.21 × 716.07
4. Step 4: Simplify right side
   1,070.27x = 1,056,343.97
5. Step 5: Solve for x
   x = 1,056,343.97/1,070.27
6. Step 6: Final answer
   x = 986.99