Finding the Third Proportional to 64,815.19 and 156,871.69

Step by Step Solution

1. Step 1: Write the proportion equation
   64,815.19 : 156,871.69 = 156,871.69 : x
2. Step 2: Convert to fraction form
   64,815.19/156,871.69 = 156,871.69/x
3. Step 3: Cross multiply
   64,815.19x = 156,871.69 × 156,871.69
4. Step 4: Simplify right side
   64,815.19x = 24,608,726,339.10
5. Step 5: Solve for x
   x = 24,608,726,339.10/64,815.19
6. Step 6: Final answer
   x = 379,675.31