Finding the Fourth Proportional to 13,978.16, 19,291.21 and 10,435.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978.16 : 19,291.21 = 10,435.22 : x
2. Step 2: Convert to fraction form
   13,978.16/19,291.21 = 10,435.22/x
3. Step 3: Cross multiply
   13,978.16x = 19,291.21 × 10,435.22
4. Step 4: Simplify right side
   13,978.16x = 201,308,020.42
5. Step 5: Solve for x
   x = 201,308,020.42/13,978.16
6. Step 6: Final answer
   x = 14,401.61