Finding the Fourth Proportional to 12,890.50, 17,791.41 and 7,301.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,890.50 : 17,791.41 = 7,301.50 : x
2. Step 2: Convert to fraction form
   12,890.50/17,791.41 = 7,301.50/x
3. Step 3: Cross multiply
   12,890.50x = 17,791.41 × 7,301.50
4. Step 4: Simplify right side
   12,890.50x = 129,903,980.12
5. Step 5: Solve for x
   x = 129,903,980.12/12,890.50
6. Step 6: Final answer
   x = 10,077.50