Finding the Fourth Proportional to 52,851.76, 72,935.34 and 28,978.38

Step by Step Solution

1. Step 1: Write the proportion equation
   52,851.76 : 72,935.34 = 28,978.38 : x
2. Step 2: Convert to fraction form
   52,851.76/72,935.34 = 28,978.38/x
3. Step 3: Cross multiply
   52,851.76x = 72,935.34 × 28,978.38
4. Step 4: Simplify right side
   52,851.76x = 2,113,547,997.95
5. Step 5: Solve for x
   x = 2,113,547,997.95/52,851.76
6. Step 6: Final answer
   x = 39,990.12