Finding the Fourth Proportional to 35,775.98, 53,673.52 and 12,402.40

Step by Step Solution

1. Step 1: Write the proportion equation
   35,775.98 : 53,673.52 = 12,402.40 : x
2. Step 2: Convert to fraction form
   35,775.98/53,673.52 = 12,402.40/x
3. Step 3: Cross multiply
   35,775.98x = 53,673.52 × 12,402.40
4. Step 4: Simplify right side
   35,775.98x = 665,680,464.45
5. Step 5: Solve for x
   x = 665,680,464.45/35,775.98
6. Step 6: Final answer
   x = 18,606.91