Finding the Fourth Proportional to 1,962.02, 2,940.17 and 986.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,962.02 : 2,940.17 = 986.78 : x
2. Step 2: Convert to fraction form
   1,962.02/2,940.17 = 986.78/x
3. Step 3: Cross multiply
   1,962.02x = 2,940.17 × 986.78
4. Step 4: Simplify right side
   1,962.02x = 2,901,303.37
5. Step 5: Solve for x
   x = 2,901,303.37/1,962.02
6. Step 6: Final answer
   x = 1,478.73