Finding the Third Proportional to 72,145 and 156,611.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,145 : 156,611.50 = 156,611.50 : x
2. Step 2: Convert to fraction form
   72,145/156,611.50 = 156,611.50/x
3. Step 3: Cross multiply
   72,145x = 156,611.50 × 156,611.50
4. Step 4: Simplify right side
   72,145x = 24,527,161,932.25
5. Step 5: Solve for x
   x = 24,527,161,932.25/72,145
6. Step 6: Final answer
   x = 339,970.36