Finding the Third Proportional to 19,620.88 and 42,909.38

Step by Step Solution

1. Step 1: Write the proportion equation
   19,620.88 : 42,909.38 = 42,909.38 : x
2. Step 2: Convert to fraction form
   19,620.88/42,909.38 = 42,909.38/x
3. Step 3: Cross multiply
   19,620.88x = 42,909.38 × 42,909.38
4. Step 4: Simplify right side
   19,620.88x = 1,841,214,462.89
5. Step 5: Solve for x
   x = 1,841,214,462.89/19,620.88
6. Step 6: Final answer
   x = 93,839.57