Finding the Third Proportional to 5,126,188 and 7,209,640

Step by Step Solution

1. Step 1: Write the proportion equation
   5,126,188 : 7,209,640 = 7,209,640 : x
2. Step 2: Convert to fraction form
   5,126,188/7,209,640 = 7,209,640/x
3. Step 3: Cross multiply
   5,126,188x = 7,209,640 × 7,209,640
4. Step 4: Simplify right side
   5,126,188x = 51,978,908,929,600
5. Step 5: Solve for x
   x = 51,978,908,929,600/5,126,188
6. Step 6: Final answer
   x = 10,139,875.66