Finding the Fourth Proportional to 1,978.88, 2,729.10 and 1,423.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.88 : 2,729.10 = 1,423.01 : x
2. Step 2: Convert to fraction form
   1,978.88/2,729.10 = 1,423.01/x
3. Step 3: Cross multiply
   1,978.88x = 2,729.10 × 1,423.01
4. Step 4: Simplify right side
   1,978.88x = 3,883,522.95
5. Step 5: Solve for x
   x = 3,883,522.95/1,978.88
6. Step 6: Final answer
   x = 1,962.49