Finding the Fourth Proportional to 1,764.18, 2,434.46 and 978.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.18 : 2,434.46 = 978.21 : x
2. Step 2: Convert to fraction form
   1,764.18/2,434.46 = 978.21/x
3. Step 3: Cross multiply
   1,764.18x = 2,434.46 × 978.21
4. Step 4: Simplify right side
   1,764.18x = 2,381,408.23
5. Step 5: Solve for x
   x = 2,381,408.23/1,764.18
6. Step 6: Final answer
   x = 1,349.87