Finding the Fourth Proportional to 1,669.83, 2,509.80 and 1,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,669.83 : 2,509.80 = 1,116.50 : x
2. Step 2: Convert to fraction form
   1,669.83/2,509.80 = 1,116.50/x
3. Step 3: Cross multiply
   1,669.83x = 2,509.80 × 1,116.50
4. Step 4: Simplify right side
   1,669.83x = 2,802,179.15
5. Step 5: Solve for x
   x = 2,802,179.15/1,669.83
6. Step 6: Final answer
   x = 1,678.12