Finding the Third Proportional to 15,415.31 and 34,042.78

Step by Step Solution

1. Step 1: Write the proportion equation
   15,415.31 : 34,042.78 = 34,042.78 : x
2. Step 2: Convert to fraction form
   15,415.31/34,042.78 = 34,042.78/x
3. Step 3: Cross multiply
   15,415.31x = 34,042.78 × 34,042.78
4. Step 4: Simplify right side
   15,415.31x = 1,158,910,955.24
5. Step 5: Solve for x
   x = 1,158,910,955.24/15,415.31
6. Step 6: Final answer
   x = 75,179.21