Finding the Third Proportional to 4,190,820 and 9,149,280

Step by Step Solution

1. Step 1: Write the proportion equation
   4,190,820 : 9,149,280 = 9,149,280 : x
2. Step 2: Convert to fraction form
   4,190,820/9,149,280 = 9,149,280/x
3. Step 3: Cross multiply
   4,190,820x = 9,149,280 × 9,149,280
4. Step 4: Simplify right side
   4,190,820x = 83,709,324,518,400
5. Step 5: Solve for x
   x = 83,709,324,518,400/4,190,820
6. Step 6: Final answer
   x = 19,974,449.99