Finding the Fourth Proportional to 1,902.30, 2,854.89 and 978.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,902.30 : 2,854.89 = 978.63 : x
2. Step 2: Convert to fraction form
   1,902.30/2,854.89 = 978.63/x
3. Step 3: Cross multiply
   1,902.30x = 2,854.89 × 978.63
4. Step 4: Simplify right side
   1,902.30x = 2,793,881.00
5. Step 5: Solve for x
   x = 2,793,881.00/1,902.30
6. Step 6: Final answer
   x = 1,468.69