Finding the Third Proportional to 72,307.69 and 156,780.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,307.69 : 156,780.56 = 156,780.56 : x
2. Step 2: Convert to fraction form
   72,307.69/156,780.56 = 156,780.56/x
3. Step 3: Cross multiply
   72,307.69x = 156,780.56 × 156,780.56
4. Step 4: Simplify right side
   72,307.69x = 24,580,144,777.82
5. Step 5: Solve for x
   x = 24,580,144,777.82/72,307.69
6. Step 6: Final answer
   x = 339,938.20