Finding the Fourth Proportional to 1,089.50, 1,502.90 and 670.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.50 : 1,502.90 = 670.06 : x
2. Step 2: Convert to fraction form
   1,089.50/1,502.90 = 670.06/x
3. Step 3: Cross multiply
   1,089.50x = 1,502.90 × 670.06
4. Step 4: Simplify right side
   1,089.50x = 1,007,033.17
5. Step 5: Solve for x
   x = 1,007,033.17/1,089.50
6. Step 6: Final answer
   x = 924.31