Finding the Fourth Proportional to 1,271.60, 1,753.27 and 988.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.60 : 1,753.27 = 988.10 : x
2. Step 2: Convert to fraction form
   1,271.60/1,753.27 = 988.10/x
3. Step 3: Cross multiply
   1,271.60x = 1,753.27 × 988.10
4. Step 4: Simplify right side
   1,271.60x = 1,732,394.85
5. Step 5: Solve for x
   x = 1,732,394.85/1,271.60
6. Step 6: Final answer
   x = 1,362.38