Finding the Fourth Proportional to 19,870.62, 27,417.69 and 13,502.30

Step by Step Solution

1. Step 1: Write the proportion equation
   19,870.62 : 27,417.69 = 13,502.30 : x
2. Step 2: Convert to fraction form
   19,870.62/27,417.69 = 13,502.30/x
3. Step 3: Cross multiply
   19,870.62x = 27,417.69 × 13,502.30
4. Step 4: Simplify right side
   19,870.62x = 370,201,738.60
5. Step 5: Solve for x
   x = 370,201,738.60/19,870.62
6. Step 6: Final answer
   x = 18,630.61