Finding the Third Proportional to 5,290,838 and 7,915,688

Step by Step Solution

1. Step 1: Write the proportion equation
   5,290,838 : 7,915,688 = 7,915,688 : x
2. Step 2: Convert to fraction form
   5,290,838/7,915,688 = 7,915,688/x
3. Step 3: Cross multiply
   5,290,838x = 7,915,688 × 7,915,688
4. Step 4: Simplify right side
   5,290,838x = 62,658,116,513,344
5. Step 5: Solve for x
   x = 62,658,116,513,344/5,290,838
6. Step 6: Final answer
   x = 11,842,758.47