Finding the Third Proportional to 5,478,577 and 8,516,271

Step by Step Solution

1. Step 1: Write the proportion equation
   5,478,577 : 8,516,271 = 8,516,271 : x
2. Step 2: Convert to fraction form
   5,478,577/8,516,271 = 8,516,271/x
3. Step 3: Cross multiply
   5,478,577x = 8,516,271 × 8,516,271
4. Step 4: Simplify right side
   5,478,577x = 72,526,871,745,441
5. Step 5: Solve for x
   x = 72,526,871,745,441/5,478,577
6. Step 6: Final answer
   x = 13,238,268.21