Finding the Fourth Proportional to 1,656.86, 2,484.56 and 779.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,656.86 : 2,484.56 = 779.61 : x
2. Step 2: Convert to fraction form
   1,656.86/2,484.56 = 779.61/x
3. Step 3: Cross multiply
   1,656.86x = 2,484.56 × 779.61
4. Step 4: Simplify right side
   1,656.86x = 1,936,987.82
5. Step 5: Solve for x
   x = 1,936,987.82/1,656.86
6. Step 6: Final answer
   x = 1,169.07