Finding the Third Proportional to 15,817.78 and 31,111.59

Step by Step Solution

1. Step 1: Write the proportion equation
   15,817.78 : 31,111.59 = 31,111.59 : x
2. Step 2: Convert to fraction form
   15,817.78/31,111.59 = 31,111.59/x
3. Step 3: Cross multiply
   15,817.78x = 31,111.59 × 31,111.59
4. Step 4: Simplify right side
   15,817.78x = 967,931,265.67
5. Step 5: Solve for x
   x = 967,931,265.67/15,817.78
6. Step 6: Final answer
   x = 61,192.61