Finding the Fourth Proportional to 52,840, 72,919.20 and 30,484

Step by Step Solution

1. Step 1: Write the proportion equation
   52,840 : 72,919.20 = 30,484 : x
2. Step 2: Convert to fraction form
   52,840/72,919.20 = 30,484/x
3. Step 3: Cross multiply
   52,840x = 72,919.20 × 30,484
4. Step 4: Simplify right side
   52,840x = 2,222,868,892.80
5. Step 5: Solve for x
   x = 2,222,868,892.80/52,840
6. Step 6: Final answer
   x = 42,067.92