Finding the Fourth Proportional to 1,656.86, 2,485.69 and 926.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,656.86 : 2,485.69 = 926.91 : x
2. Step 2: Convert to fraction form
   1,656.86/2,485.69 = 926.91/x
3. Step 3: Cross multiply
   1,656.86x = 2,485.69 × 926.91
4. Step 4: Simplify right side
   1,656.86x = 2,304,008.60
5. Step 5: Solve for x
   x = 2,304,008.60/1,656.86
6. Step 6: Final answer
   x = 1,390.59