Finding the Fourth Proportional to 9,812.49, 13,540.89 and 5,619.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,812.49 : 13,540.89 = 5,619.93 : x
2. Step 2: Convert to fraction form
   9,812.49/13,540.89 = 5,619.93/x
3. Step 3: Cross multiply
   9,812.49x = 13,540.89 × 5,619.93
4. Step 4: Simplify right side
   9,812.49x = 76,098,853.94
5. Step 5: Solve for x
   x = 76,098,853.94/9,812.49
6. Step 6: Final answer
   x = 7,755.31