Finding the Fourth Proportional to 13,259.81, 18,298.55 and 7,291.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,259.81 : 18,298.55 = 7,291.89 : x
2. Step 2: Convert to fraction form
   13,259.81/18,298.55 = 7,291.89/x
3. Step 3: Cross multiply
   13,259.81x = 18,298.55 × 7,291.89
4. Step 4: Simplify right side
   13,259.81x = 133,430,977.30
5. Step 5: Solve for x
   x = 133,430,977.30/13,259.81
6. Step 6: Final answer
   x = 10,062.81