Finding the Fourth Proportional to 1,618.82, 2,429.68 and 849.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.82 : 2,429.68 = 849.86 : x
2. Step 2: Convert to fraction form
   1,618.82/2,429.68 = 849.86/x
3. Step 3: Cross multiply
   1,618.82x = 2,429.68 × 849.86
4. Step 4: Simplify right side
   1,618.82x = 2,064,887.84
5. Step 5: Solve for x
   x = 2,064,887.84/1,618.82
6. Step 6: Final answer
   x = 1,275.55