Finding the Fourth Proportional to 10,439.15, 14,419.82 and 7,781.94

Step by Step Solution

1. Step 1: Write the proportion equation
   10,439.15 : 14,419.82 = 7,781.94 : x
2. Step 2: Convert to fraction form
   10,439.15/14,419.82 = 7,781.94/x
3. Step 3: Cross multiply
   10,439.15x = 14,419.82 × 7,781.94
4. Step 4: Simplify right side
   10,439.15x = 112,214,193.51
5. Step 5: Solve for x
   x = 112,214,193.51/10,439.15
6. Step 6: Final answer
   x = 10,749.37