Finding the Fourth Proportional to 1,303.89, 1,801.83 and 988.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,303.89 : 1,801.83 = 988.59 : x
2. Step 2: Convert to fraction form
   1,303.89/1,801.83 = 988.59/x
3. Step 3: Cross multiply
   1,303.89x = 1,801.83 × 988.59
4. Step 4: Simplify right side
   1,303.89x = 1,781,271.12
5. Step 5: Solve for x
   x = 1,781,271.12/1,303.89
6. Step 6: Final answer
   x = 1,366.12