Finding the Fourth Proportional to 11,407.84, 17,139.42 and 10,778.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,407.84 : 17,139.42 = 10,778.46 : x
2. Step 2: Convert to fraction form
   11,407.84/17,139.42 = 10,778.46/x
3. Step 3: Cross multiply
   11,407.84x = 17,139.42 × 10,778.46
4. Step 4: Simplify right side
   11,407.84x = 184,736,552.89
5. Step 5: Solve for x
   x = 184,736,552.89/11,407.84
6. Step 6: Final answer
   x = 16,193.82