Finding the Fourth Proportional to 23,820.17, 35,700.69 and 8,219.57

Step by Step Solution

1. Step 1: Write the proportion equation
   23,820.17 : 35,700.69 = 8,219.57 : x
2. Step 2: Convert to fraction form
   23,820.17/35,700.69 = 8,219.57/x
3. Step 3: Cross multiply
   23,820.17x = 35,700.69 × 8,219.57
4. Step 4: Simplify right side
   23,820.17x = 293,444,320.50
5. Step 5: Solve for x
   x = 293,444,320.50/23,820.17
6. Step 6: Final answer
   x = 12,319.15