Finding the Fourth Proportional to 19,389.62, 26,756.72 and 10,890.70

Step by Step Solution

1. Step 1: Write the proportion equation
   19,389.62 : 26,756.72 = 10,890.70 : x
2. Step 2: Convert to fraction form
   19,389.62/26,756.72 = 10,890.70/x
3. Step 3: Cross multiply
   19,389.62x = 26,756.72 × 10,890.70
4. Step 4: Simplify right side
   19,389.62x = 291,399,410.50
5. Step 5: Solve for x
   x = 291,399,410.50/19,389.62
6. Step 6: Final answer
   x = 15,028.63