Finding the Fourth Proportional to 1,802.34, 2,697.63 and 978.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,802.34 : 2,697.63 = 978.57 : x
2. Step 2: Convert to fraction form
   1,802.34/2,697.63 = 978.57/x
3. Step 3: Cross multiply
   1,802.34x = 2,697.63 × 978.57
4. Step 4: Simplify right side
   1,802.34x = 2,639,819.79
5. Step 5: Solve for x
   x = 2,639,819.79/1,802.34
6. Step 6: Final answer
   x = 1,464.66