Finding the Third Proportional to 478.50 and 1,047

Step by Step Solution

1. Step 1: Write the proportion equation
   478.50 : 1,047 = 1,047 : x
2. Step 2: Convert to fraction form
   478.50/1,047 = 1,047/x
3. Step 3: Cross multiply
   478.50x = 1,047 × 1,047
4. Step 4: Simplify right side
   478.50x = 1,096,209
5. Step 5: Solve for x
   x = 1,096,209/478.50
6. Step 6: Final answer
   x = 2,290.93