Finding the Fourth Proportional to 10,089.21, 13,921.79 and 5,612.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,089.21 : 13,921.79 = 5,612.07 : x
2. Step 2: Convert to fraction form
   10,089.21/13,921.79 = 5,612.07/x
3. Step 3: Cross multiply
   10,089.21x = 13,921.79 × 5,612.07
4. Step 4: Simplify right side
   10,089.21x = 78,130,031.94
5. Step 5: Solve for x
   x = 78,130,031.94/10,089.21
6. Step 6: Final answer
   x = 7,743.92