Finding the Fourth Proportional to 1,764.47, 2,434.94 and 978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.47 : 2,434.94 = 978.50 : x
2. Step 2: Convert to fraction form
   1,764.47/2,434.94 = 978.50/x
3. Step 3: Cross multiply
   1,764.47x = 2,434.94 × 978.50
4. Step 4: Simplify right side
   1,764.47x = 2,382,588.79
5. Step 5: Solve for x
   x = 2,382,588.79/1,764.47
6. Step 6: Final answer
   x = 1,350.31