Finding the Third Proportional to 3,970,264 and 8,590,054

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970,264 : 8,590,054 = 8,590,054 : x
2. Step 2: Convert to fraction form
   3,970,264/8,590,054 = 8,590,054/x
3. Step 3: Cross multiply
   3,970,264x = 8,590,054 × 8,590,054
4. Step 4: Simplify right side
   3,970,264x = 73,789,027,722,916
5. Step 5: Solve for x
   x = 73,789,027,722,916/3,970,264
6. Step 6: Final answer
   x = 18,585,420.95