Finding the Fourth Proportional to 1,685.86, 2,326.82 and 977.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.86 : 2,326.82 = 977.82 : x
2. Step 2: Convert to fraction form
   1,685.86/2,326.82 = 977.82/x
3. Step 3: Cross multiply
   1,685.86x = 2,326.82 × 977.82
4. Step 4: Simplify right side
   1,685.86x = 2,275,211.13
5. Step 5: Solve for x
   x = 2,275,211.13/1,685.86
6. Step 6: Final answer
   x = 1,349.58