Finding the Fourth Proportional to 52,653.78, 72,664.17 and 28,782.06

Step by Step Solution

1. Step 1: Write the proportion equation
   52,653.78 : 72,664.17 = 28,782.06 : x
2. Step 2: Convert to fraction form
   52,653.78/72,664.17 = 28,782.06/x
3. Step 3: Cross multiply
   52,653.78x = 72,664.17 × 28,782.06
4. Step 4: Simplify right side
   52,653.78x = 2,091,424,500.79
5. Step 5: Solve for x
   x = 2,091,424,500.79/52,653.78
6. Step 6: Final answer
   x = 39,720.31