Finding the Third Proportional to 784 and 1,784.50

Step by Step Solution

1. Step 1: Write the proportion equation
   784 : 1,784.50 = 1,784.50 : x
2. Step 2: Convert to fraction form
   784/1,784.50 = 1,784.50/x
3. Step 3: Cross multiply
   784x = 1,784.50 × 1,784.50
4. Step 4: Simplify right side
   784x = 3,184,440.25
5. Step 5: Solve for x
   x = 3,184,440.25/784
6. Step 6: Final answer
   x = 4,061.79