Finding the Fourth Proportional to 1,806.16, 2,490.96 and 1,387.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,806.16 : 2,490.96 = 1,387.52 : x
2. Step 2: Convert to fraction form
   1,806.16/2,490.96 = 1,387.52/x
3. Step 3: Cross multiply
   1,806.16x = 2,490.96 × 1,387.52
4. Step 4: Simplify right side
   1,806.16x = 3,456,256.82
5. Step 5: Solve for x
   x = 3,456,256.82/1,806.16
6. Step 6: Final answer
   x = 1,913.59