Finding the Fourth Proportional to 2,109.29, 2,907.50 and 1,445.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.29 : 2,907.50 = 1,445.00 : x
2. Step 2: Convert to fraction form
   2,109.29/2,907.50 = 1,445.00/x
3. Step 3: Cross multiply
   2,109.29x = 2,907.50 × 1,445.00
4. Step 4: Simplify right side
   2,109.29x = 4,201,326.57
5. Step 5: Solve for x
   x = 4,201,326.57/2,109.29
6. Step 6: Final answer
   x = 1,991.82