Finding the Fourth Proportional to 13,187.84, 19,784.72 and 4,422.53

Step by Step Solution

1. Step 1: Write the proportion equation
   13,187.84 : 19,784.72 = 4,422.53 : x
2. Step 2: Convert to fraction form
   13,187.84/19,784.72 = 4,422.53/x
3. Step 3: Cross multiply
   13,187.84x = 19,784.72 × 4,422.53
4. Step 4: Simplify right side
   13,187.84x = 87,498,396.71
5. Step 5: Solve for x
   x = 87,498,396.71/13,187.84
6. Step 6: Final answer
   x = 6,634.78