Finding the Fourth Proportional to 35,607.60, 53,423.78 and 13,427.37

Step by Step Solution

1. Step 1: Write the proportion equation
   35,607.60 : 53,423.78 = 13,427.37 : x
2. Step 2: Convert to fraction form
   35,607.60/53,423.78 = 13,427.37/x
3. Step 3: Cross multiply
   35,607.60x = 53,423.78 × 13,427.37
4. Step 4: Simplify right side
   35,607.60x = 717,340,793.72
5. Step 5: Solve for x
   x = 717,340,793.72/35,607.60
6. Step 6: Final answer
   x = 20,145.72