Finding the Fourth Proportional to 82,109.55, 123,164.09 and 19,780.05

Step by Step Solution

1. Step 1: Write the proportion equation
   82,109.55 : 123,164.09 = 19,780.05 : x
2. Step 2: Convert to fraction form
   82,109.55/123,164.09 = 19,780.05/x
3. Step 3: Cross multiply
   82,109.55x = 123,164.09 × 19,780.05
4. Step 4: Simplify right side
   82,109.55x = 2,436,191,714.01
5. Step 5: Solve for x
   x = 2,436,191,714.01/82,109.55
6. Step 6: Final answer
   x = 29,670.02