Finding the Fourth Proportional to 1,087.56, 1,499.94 and 667.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.56 : 1,499.94 = 667.53 : x
2. Step 2: Convert to fraction form
   1,087.56/1,499.94 = 667.53/x
3. Step 3: Cross multiply
   1,087.56x = 1,499.94 × 667.53
4. Step 4: Simplify right side
   1,087.56x = 1,001,254.95
5. Step 5: Solve for x
   x = 1,001,254.95/1,087.56
6. Step 6: Final answer
   x = 920.64