Finding the Fourth Proportional to 1,799.86, 2,478.45 and 1,669.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,799.86 : 2,478.45 = 1,669.18 : x
2. Step 2: Convert to fraction form
   1,799.86/2,478.45 = 1,669.18/x
3. Step 3: Cross multiply
   1,799.86x = 2,478.45 × 1,669.18
4. Step 4: Simplify right side
   1,799.86x = 4,136,979.17
5. Step 5: Solve for x
   x = 4,136,979.17/1,799.86
6. Step 6: Final answer
   x = 2,298.50