Finding the Fourth Proportional to 1,089.54, 1,502.89 and 670.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.54 : 1,502.89 = 670.10 : x
2. Step 2: Convert to fraction form
   1,089.54/1,502.89 = 670.10/x
3. Step 3: Cross multiply
   1,089.54x = 1,502.89 × 670.10
4. Step 4: Simplify right side
   1,089.54x = 1,007,086.59
5. Step 5: Solve for x
   x = 1,007,086.59/1,089.54
6. Step 6: Final answer
   x = 924.32