Finding the Fourth Proportional to 82,320.04, 123,480.44 and 19,990.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82,320.04 : 123,480.44 = 19,990.56 : x
2. Step 2: Convert to fraction form
   82,320.04/123,480.44 = 19,990.56/x
3. Step 3: Cross multiply
   82,320.04x = 123,480.44 × 19,990.56
4. Step 4: Simplify right side
   82,320.04x = 2,468,443,144.65
5. Step 5: Solve for x
   x = 2,468,443,144.65/82,320.04
6. Step 6: Final answer
   x = 29,985.93