Finding the Fourth Proportional to 82,259.12, 123,388.72 and 19,929.68

Step by Step Solution

1. Step 1: Write the proportion equation
   82,259.12 : 123,388.72 = 19,929.68 : x
2. Step 2: Convert to fraction form
   82,259.12/123,388.72 = 19,929.68/x
3. Step 3: Cross multiply
   82,259.12x = 123,388.72 × 19,929.68
4. Step 4: Simplify right side
   82,259.12x = 2,459,097,705.21
5. Step 5: Solve for x
   x = 2,459,097,705.21/82,259.12
6. Step 6: Final answer
   x = 29,894.53