Finding the Fourth Proportional to 2,089.46, 3,135.06 and 978.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.46 : 3,135.06 = 978.07 : x
2. Step 2: Convert to fraction form
   2,089.46/3,135.06 = 978.07/x
3. Step 3: Cross multiply
   2,089.46x = 3,135.06 × 978.07
4. Step 4: Simplify right side
   2,089.46x = 3,066,287.57
5. Step 5: Solve for x
   x = 3,066,287.57/2,089.46
6. Step 6: Final answer
   x = 1,467.50