Finding the Fourth Proportional to 37,870.20, 52,258.68 and 20,876.76

Step by Step Solution

1. Step 1: Write the proportion equation
   37,870.20 : 52,258.68 = 20,876.76 : x
2. Step 2: Convert to fraction form
   37,870.20/52,258.68 = 20,876.76/x
3. Step 3: Cross multiply
   37,870.20x = 52,258.68 × 20,876.76
4. Step 4: Simplify right side
   37,870.20x = 1,090,991,920.28
5. Step 5: Solve for x
   x = 1,090,991,920.28/37,870.20
6. Step 6: Final answer
   x = 28,808.72