Finding the Fourth Proportional to 82,890.19, 124,335.15 and 20,560.69

Step by Step Solution

1. Step 1: Write the proportion equation
   82,890.19 : 124,335.15 = 20,560.69 : x
2. Step 2: Convert to fraction form
   82,890.19/124,335.15 = 20,560.69/x
3. Step 3: Cross multiply
   82,890.19x = 124,335.15 × 20,560.69
4. Step 4: Simplify right side
   82,890.19x = 2,556,416,475.25
5. Step 5: Solve for x
   x = 2,556,416,475.25/82,890.19
6. Step 6: Final answer
   x = 30,841.00