Finding the Fourth Proportional to 13,978.78, 19,292.07 and 10,435.84

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978.78 : 19,292.07 = 10,435.84 : x
2. Step 2: Convert to fraction form
   13,978.78/19,292.07 = 10,435.84/x
3. Step 3: Cross multiply
   13,978.78x = 19,292.07 × 10,435.84
4. Step 4: Simplify right side
   13,978.78x = 201,328,946.69
5. Step 5: Solve for x
   x = 201,328,946.69/13,978.78
6. Step 6: Final answer
   x = 14,402.47