Finding the Fourth Proportional to 1,872.17, 2,796.59 and 1,386.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.17 : 2,796.59 = 1,386.17 : x
2. Step 2: Convert to fraction form
   1,872.17/2,796.59 = 1,386.17/x
3. Step 3: Cross multiply
   1,872.17x = 2,796.59 × 1,386.17
4. Step 4: Simplify right side
   1,872.17x = 3,876,528.25
5. Step 5: Solve for x
   x = 3,876,528.25/1,872.17
6. Step 6: Final answer
   x = 2,070.61