Finding the Third Proportional to 29,720.81 and 64,396.13

Step by Step Solution

1. Step 1: Write the proportion equation
   29,720.81 : 64,396.13 = 64,396.13 : x
2. Step 2: Convert to fraction form
   29,720.81/64,396.13 = 64,396.13/x
3. Step 3: Cross multiply
   29,720.81x = 64,396.13 × 64,396.13
4. Step 4: Simplify right side
   29,720.81x = 4,146,860,915.02
5. Step 5: Solve for x
   x = 4,146,860,915.02/29,720.81
6. Step 6: Final answer
   x = 139,527.17