Finding the Fourth Proportional to 14,093.90, 19,449.32 and 7,720.31

Step by Step Solution

1. Step 1: Write the proportion equation
   14,093.90 : 19,449.32 = 7,720.31 : x
2. Step 2: Convert to fraction form
   14,093.90/19,449.32 = 7,720.31/x
3. Step 3: Cross multiply
   14,093.90x = 19,449.32 × 7,720.31
4. Step 4: Simplify right side
   14,093.90x = 150,154,789.71
5. Step 5: Solve for x
   x = 150,154,789.71/14,093.90
6. Step 6: Final answer
   x = 10,653.89