Finding the Third Proportional to 904.50 and 2,124.56

Step by Step Solution

1. Step 1: Write the proportion equation
   904.50 : 2,124.56 = 2,124.56 : x
2. Step 2: Convert to fraction form
   904.50/2,124.56 = 2,124.56/x
3. Step 3: Cross multiply
   904.50x = 2,124.56 × 2,124.56
4. Step 4: Simplify right side
   904.50x = 4,513,765.82
5. Step 5: Solve for x
   x = 4,513,765.82/904.50
6. Step 6: Final answer
   x = 4,990.34