Finding the Fourth Proportional to 1,656.47, 2,485.76 and 926.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,656.47 : 2,485.76 = 926.53 : x
2. Step 2: Convert to fraction form
   1,656.47/2,485.76 = 926.53/x
3. Step 3: Cross multiply
   1,656.47x = 2,485.76 × 926.53
4. Step 4: Simplify right side
   1,656.47x = 2,303,120.37
5. Step 5: Solve for x
   x = 2,303,120.37/1,656.47
6. Step 6: Final answer
   x = 1,390.38