Finding the Third Proportional to 36,290.57 and 78,142.61

Step by Step Solution

1. Step 1: Write the proportion equation
   36,290.57 : 78,142.61 = 78,142.61 : x
2. Step 2: Convert to fraction form
   36,290.57/78,142.61 = 78,142.61/x
3. Step 3: Cross multiply
   36,290.57x = 78,142.61 × 78,142.61
4. Step 4: Simplify right side
   36,290.57x = 6,106,266,789.44
5. Step 5: Solve for x
   x = 6,106,266,789.44/36,290.57
6. Step 6: Final answer
   x = 168,260.44