Finding the Fourth Proportional to 1,764.04, 2,434.32 and 978.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.04 : 2,434.32 = 978.12 : x
2. Step 2: Convert to fraction form
   1,764.04/2,434.32 = 978.12/x
3. Step 3: Cross multiply
   1,764.04x = 2,434.32 × 978.12
4. Step 4: Simplify right side
   1,764.04x = 2,381,057.08
5. Step 5: Solve for x
   x = 2,381,057.08/1,764.04
6. Step 6: Final answer
   x = 1,349.77