Finding the Fourth Proportional to 13,870.03, 19,138.86 and 8,494.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,870.03 : 19,138.86 = 8,494.87 : x
2. Step 2: Convert to fraction form
   13,870.03/19,138.86 = 8,494.87/x
3. Step 3: Cross multiply
   13,870.03x = 19,138.86 × 8,494.87
4. Step 4: Simplify right side
   13,870.03x = 162,582,079.80
5. Step 5: Solve for x
   x = 162,582,079.80/13,870.03
6. Step 6: Final answer
   x = 11,721.83