Finding the Third Proportional to 54,136.66 and 81,837.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,136.66 : 81,837.50 = 81,837.50 : x
2. Step 2: Convert to fraction form
   54,136.66/81,837.50 = 81,837.50/x
3. Step 3: Cross multiply
   54,136.66x = 81,837.50 × 81,837.50
4. Step 4: Simplify right side
   54,136.66x = 6,697,376,835.82
5. Step 5: Solve for x
   x = 6,697,376,835.82/54,136.66
6. Step 6: Final answer
   x = 123,712.41