Finding the Third Proportional to 5,469,258 and 8,490,591

Step by Step Solution

1. Step 1: Write the proportion equation
   5,469,258 : 8,490,591 = 8,490,591 : x
2. Step 2: Convert to fraction form
   5,469,258/8,490,591 = 8,490,591/x
3. Step 3: Cross multiply
   5,469,258x = 8,490,591 × 8,490,591
4. Step 4: Simplify right side
   5,469,258x = 72,090,135,529,281
5. Step 5: Solve for x
   x = 72,090,135,529,281/5,469,258
6. Step 6: Final answer
   x = 13,180,971.81