Finding the Fourth Proportional to 1,477.56, 2,039.88 and 980.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,477.56 : 2,039.88 = 980.88 : x
2. Step 2: Convert to fraction form
   1,477.56/2,039.88 = 980.88/x
3. Step 3: Cross multiply
   1,477.56x = 2,039.88 × 980.88
4. Step 4: Simplify right side
   1,477.56x = 2,000,877.49
5. Step 5: Solve for x
   x = 2,000,877.49/1,477.56
6. Step 6: Final answer
   x = 1,354.18