Finding the Third Proportional to 3,478,438 and 5,416,428

Step by Step Solution

1. Step 1: Write the proportion equation
   3,478,438 : 5,416,428 = 5,416,428 : x
2. Step 2: Convert to fraction form
   3,478,438/5,416,428 = 5,416,428/x
3. Step 3: Cross multiply
   3,478,438x = 5,416,428 × 5,416,428
4. Step 4: Simplify right side
   3,478,438x = 29,337,692,279,184
5. Step 5: Solve for x
   x = 29,337,692,279,184/3,478,438
6. Step 6: Final answer
   x = 8,434,157.02