Finding the Fourth Proportional to 1,978.45, 2,962.20 and 1,490.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.45 : 2,962.20 = 1,490.02 : x
2. Step 2: Convert to fraction form
   1,978.45/2,962.20 = 1,490.02/x
3. Step 3: Cross multiply
   1,978.45x = 2,962.20 × 1,490.02
4. Step 4: Simplify right side
   1,978.45x = 4,413,737.24
5. Step 5: Solve for x
   x = 4,413,737.24/1,978.45
6. Step 6: Final answer
   x = 2,230.91