Finding the Fourth Proportional to 36,931.48, 55,404.48 and 13,558.12

Step by Step Solution

1. Step 1: Write the proportion equation
   36,931.48 : 55,404.48 = 13,558.12 : x
2. Step 2: Convert to fraction form
   36,931.48/55,404.48 = 13,558.12/x
3. Step 3: Cross multiply
   36,931.48x = 55,404.48 × 13,558.12
4. Step 4: Simplify right side
   36,931.48x = 751,180,588.38
5. Step 5: Solve for x
   x = 751,180,588.38/36,931.48
6. Step 6: Final answer
   x = 20,339.85