Finding the Third Proportional to 5,136,178 and 7,688,228

Step by Step Solution

1. Step 1: Write the proportion equation
   5,136,178 : 7,688,228 = 7,688,228 : x
2. Step 2: Convert to fraction form
   5,136,178/7,688,228 = 7,688,228/x
3. Step 3: Cross multiply
   5,136,178x = 7,688,228 × 7,688,228
4. Step 4: Simplify right side
   5,136,178x = 59,108,849,779,984
5. Step 5: Solve for x
   x = 59,108,849,779,984/5,136,178
6. Step 6: Final answer
   x = 11,508,333.59