Finding the Fourth Proportional to 1,477.31, 2,039.54 and 980.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,477.31 : 2,039.54 = 980.63 : x
2. Step 2: Convert to fraction form
   1,477.31/2,039.54 = 980.63/x
3. Step 3: Cross multiply
   1,477.31x = 2,039.54 × 980.63
4. Step 4: Simplify right side
   1,477.31x = 2,000,034.11
5. Step 5: Solve for x
   x = 2,000,034.11/1,477.31
6. Step 6: Final answer
   x = 1,353.84