Finding the Third Proportional to 4,173,120 and 9,143,280

Step by Step Solution

1. Step 1: Write the proportion equation
   4,173,120 : 9,143,280 = 9,143,280 : x
2. Step 2: Convert to fraction form
   4,173,120/9,143,280 = 9,143,280/x
3. Step 3: Cross multiply
   4,173,120x = 9,143,280 × 9,143,280
4. Step 4: Simplify right side
   4,173,120x = 83,599,569,158,400
5. Step 5: Solve for x
   x = 83,599,569,158,400/4,173,120
6. Step 6: Final answer
   x = 20,032,869.69