Finding the Fourth Proportional to 1,373.51, 2,061.41 and 1,287.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,373.51 : 2,061.41 = 1,287.01 : x
2. Step 2: Convert to fraction form
   1,373.51/2,061.41 = 1,287.01/x
3. Step 3: Cross multiply
   1,373.51x = 2,061.41 × 1,287.01
4. Step 4: Simplify right side
   1,373.51x = 2,653,043.70
5. Step 5: Solve for x
   x = 2,653,043.70/1,373.51
6. Step 6: Final answer
   x = 1,931.59