Finding the Fourth Proportional to 1,807.68, 2,493.06 and 1,387.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.68 : 2,493.06 = 1,387.89 : x
2. Step 2: Convert to fraction form
   1,807.68/2,493.06 = 1,387.89/x
3. Step 3: Cross multiply
   1,807.68x = 2,493.06 × 1,387.89
4. Step 4: Simplify right side
   1,807.68x = 3,460,093.04
5. Step 5: Solve for x
   x = 3,460,093.04/1,807.68
6. Step 6: Final answer
   x = 1,914.11