Finding the Fourth Proportional to 35,978.14, 53,936.43 and 13,807.43

Step by Step Solution

1. Step 1: Write the proportion equation
   35,978.14 : 53,936.43 = 13,807.43 : x
2. Step 2: Convert to fraction form
   35,978.14/53,936.43 = 13,807.43/x
3. Step 3: Cross multiply
   35,978.14x = 53,936.43 × 13,807.43
4. Step 4: Simplify right side
   35,978.14x = 744,723,481.67
5. Step 5: Solve for x
   x = 744,723,481.67/35,978.14
6. Step 6: Final answer
   x = 20,699.33