Finding the Third Proportional to 5,398,312 and 8,153,240

Step by Step Solution

1. Step 1: Write the proportion equation
   5,398,312 : 8,153,240 = 8,153,240 : x
2. Step 2: Convert to fraction form
   5,398,312/8,153,240 = 8,153,240/x
3. Step 3: Cross multiply
   5,398,312x = 8,153,240 × 8,153,240
4. Step 4: Simplify right side
   5,398,312x = 66,475,322,497,600
5. Step 5: Solve for x
   x = 66,475,322,497,600/5,398,312
6. Step 6: Final answer
   x = 12,314,094.20