Finding the Fourth Proportional to 2,109.32, 3,147.25 and 1,985.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.32 : 3,147.25 = 1,985.48 : x
2. Step 2: Convert to fraction form
   2,109.32/3,147.25 = 1,985.48/x
3. Step 3: Cross multiply
   2,109.32x = 3,147.25 × 1,985.48
4. Step 4: Simplify right side
   2,109.32x = 6,248,801.93
5. Step 5: Solve for x
   x = 6,248,801.93/2,109.32
6. Step 6: Final answer
   x = 2,962.47