Finding the Third Proportional to 34,143.61 and 69,641.44

Step by Step Solution

1. Step 1: Write the proportion equation
   34,143.61 : 69,641.44 = 69,641.44 : x
2. Step 2: Convert to fraction form
   34,143.61/69,641.44 = 69,641.44/x
3. Step 3: Cross multiply
   34,143.61x = 69,641.44 × 69,641.44
4. Step 4: Simplify right side
   34,143.61x = 4,849,929,817.07
5. Step 5: Solve for x
   x = 4,849,929,817.07/34,143.61
6. Step 6: Final answer
   x = 142,045.02