Finding the Fourth Proportional to 8,575.42, 12,870.42 and 3,384.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,575.42 : 12,870.42 = 3,384.94 : x
2. Step 2: Convert to fraction form
   8,575.42/12,870.42 = 3,384.94/x
3. Step 3: Cross multiply
   8,575.42x = 12,870.42 × 3,384.94
4. Step 4: Simplify right side
   8,575.42x = 43,565,599.47
5. Step 5: Solve for x
   x = 43,565,599.47/8,575.42
6. Step 6: Final answer
   x = 5,080.29