Finding the Fourth Proportional to 1,901.99, 2,621.60 and 1,272.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,901.99 : 2,621.60 = 1,272.29 : x
2. Step 2: Convert to fraction form
   1,901.99/2,621.60 = 1,272.29/x
3. Step 3: Cross multiply
   1,901.99x = 2,621.60 × 1,272.29
4. Step 4: Simplify right side
   1,901.99x = 3,335,425.54
5. Step 5: Solve for x
   x = 3,335,425.54/1,901.99
6. Step 6: Final answer
   x = 1,753.66