Finding the Third Proportional to 30,876.61 and 66,434.34

Step by Step Solution

1. Step 1: Write the proportion equation
   30,876.61 : 66,434.34 = 66,434.34 : x
2. Step 2: Convert to fraction form
   30,876.61/66,434.34 = 66,434.34/x
3. Step 3: Cross multiply
   30,876.61x = 66,434.34 × 66,434.34
4. Step 4: Simplify right side
   30,876.61x = 4,413,522,029.49
5. Step 5: Solve for x
   x = 4,413,522,029.49/30,876.61
6. Step 6: Final answer
   x = 142,940.63