Finding the Fourth Proportional to 1,190.52, 1,642.14 and 718.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,190.52 : 1,642.14 = 718.10 : x
2. Step 2: Convert to fraction form
   1,190.52/1,642.14 = 718.10/x
3. Step 3: Cross multiply
   1,190.52x = 1,642.14 × 718.10
4. Step 4: Simplify right side
   1,190.52x = 1,179,212.52
5. Step 5: Solve for x
   x = 1,179,212.52/1,190.52
6. Step 6: Final answer
   x = 990.50