Finding the Fourth Proportional to 10,019.71, 13,818.81 and 7,507.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,019.71 : 13,818.81 = 7,507.72 : x
2. Step 2: Convert to fraction form
   10,019.71/13,818.81 = 7,507.72/x
3. Step 3: Cross multiply
   10,019.71x = 13,818.81 × 7,507.72
4. Step 4: Simplify right side
   10,019.71x = 103,747,756.21
5. Step 5: Solve for x
   x = 103,747,756.21/10,019.71
6. Step 6: Final answer
   x = 10,354.37