Finding the Fourth Proportional to 36,870.64, 55,288.68 and 13,480.72

Step by Step Solution

1. Step 1: Write the proportion equation
   36,870.64 : 55,288.68 = 13,480.72 : x
2. Step 2: Convert to fraction form
   36,870.64/55,288.68 = 13,480.72/x
3. Step 3: Cross multiply
   36,870.64x = 55,288.68 × 13,480.72
4. Step 4: Simplify right side
   36,870.64x = 745,331,214.25
5. Step 5: Solve for x
   x = 745,331,214.25/36,870.64
6. Step 6: Final answer
   x = 20,214.76