Finding the Fourth Proportional to 52,851.57, 72,934.64 and 28,978.19

Step by Step Solution

1. Step 1: Write the proportion equation
   52,851.57 : 72,934.64 = 28,978.19 : x
2. Step 2: Convert to fraction form
   52,851.57/72,934.64 = 28,978.19/x
3. Step 3: Cross multiply
   52,851.57x = 72,934.64 × 28,978.19
4. Step 4: Simplify right side
   52,851.57x = 2,113,513,855.50
5. Step 5: Solve for x
   x = 2,113,513,855.50/52,851.57
6. Step 6: Final answer
   x = 39,989.61