Finding the Fourth Proportional to 53,099.37, 79,653.51 and 13,656.42

Step by Step Solution

1. Step 1: Write the proportion equation
   53,099.37 : 79,653.51 = 13,656.42 : x
2. Step 2: Convert to fraction form
   53,099.37/79,653.51 = 13,656.42/x
3. Step 3: Cross multiply
   53,099.37x = 79,653.51 × 13,656.42
4. Step 4: Simplify right side
   53,099.37x = 1,087,781,787.03
5. Step 5: Solve for x
   x = 1,087,781,787.03/53,099.37
6. Step 6: Final answer
   x = 20,485.78