Finding the Fourth Proportional to 1,038.51, 1,426.59 and 985.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.51 : 1,426.59 = 985.86 : x
2. Step 2: Convert to fraction form
   1,038.51/1,426.59 = 985.86/x
3. Step 3: Cross multiply
   1,038.51x = 1,426.59 × 985.86
4. Step 4: Simplify right side
   1,038.51x = 1,406,418.02
5. Step 5: Solve for x
   x = 1,406,418.02/1,038.51
6. Step 6: Final answer
   x = 1,354.27