Finding the Fourth Proportional to 35,978.02, 53,936.24 and 13,807.30

Step by Step Solution

1. Step 1: Write the proportion equation
   35,978.02 : 53,936.24 = 13,807.30 : x
2. Step 2: Convert to fraction form
   35,978.02/53,936.24 = 13,807.30/x
3. Step 3: Cross multiply
   35,978.02x = 53,936.24 × 13,807.30
4. Step 4: Simplify right side
   35,978.02x = 744,713,846.55
5. Step 5: Solve for x
   x = 744,713,846.55/35,978.02
6. Step 6: Final answer
   x = 20,699.13