Finding the Third Proportional to 4,073,558 and 8,478,536

Step by Step Solution

1. Step 1: Write the proportion equation
   4,073,558 : 8,478,536 = 8,478,536 : x
2. Step 2: Convert to fraction form
   4,073,558/8,478,536 = 8,478,536/x
3. Step 3: Cross multiply
   4,073,558x = 8,478,536 × 8,478,536
4. Step 4: Simplify right side
   4,073,558x = 71,885,572,703,296
5. Step 5: Solve for x
   x = 71,885,572,703,296/4,073,558
6. Step 6: Final answer
   x = 17,646,875.95