Finding the Fourth Proportional to 12,985.61, 19,479.77 and 5,964.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,985.61 : 19,479.77 = 5,964.42 : x
2. Step 2: Convert to fraction form
   12,985.61/19,479.77 = 5,964.42/x
3. Step 3: Cross multiply
   12,985.61x = 19,479.77 × 5,964.42
4. Step 4: Simplify right side
   12,985.61x = 116,185,499.96
5. Step 5: Solve for x
   x = 116,185,499.96/12,985.61
6. Step 6: Final answer
   x = 8,947.25