Finding the Fourth Proportional to 1,076.48, 1,484.52 and 656.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.48 : 1,484.52 = 656.90 : x
2. Step 2: Convert to fraction form
   1,076.48/1,484.52 = 656.90/x
3. Step 3: Cross multiply
   1,076.48x = 1,484.52 × 656.90
4. Step 4: Simplify right side
   1,076.48x = 975,181.19
5. Step 5: Solve for x
   x = 975,181.19/1,076.48
6. Step 6: Final answer
   x = 905.90