Finding the Fourth Proportional to 10,389.60, 14,337.42 and 5,673.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,389.60 : 14,337.42 = 5,673.90 : x
2. Step 2: Convert to fraction form
   10,389.60/14,337.42 = 5,673.90/x
3. Step 3: Cross multiply
   10,389.60x = 14,337.42 × 5,673.90
4. Step 4: Simplify right side
   10,389.60x = 81,349,087.34
5. Step 5: Solve for x
   x = 81,349,087.34/10,389.60
6. Step 6: Final answer
   x = 7,829.86