Finding the Fourth Proportional to 52,854.14, 72,938.61 and 28,980.78

Step by Step Solution

1. Step 1: Write the proportion equation
   52,854.14 : 72,938.61 = 28,980.78 : x
2. Step 2: Convert to fraction form
   52,854.14/72,938.61 = 28,980.78/x
3. Step 3: Cross multiply
   52,854.14x = 72,938.61 × 28,980.78
4. Step 4: Simplify right side
   52,854.14x = 2,113,817,809.92
5. Step 5: Solve for x
   x = 2,113,817,809.92/52,854.14
6. Step 6: Final answer
   x = 39,993.42