Finding the Fourth Proportional to 52,646.78, 72,649.80 and 28,768.79

Step by Step Solution

1. Step 1: Write the proportion equation
   52,646.78 : 72,649.80 = 28,768.79 : x
2. Step 2: Convert to fraction form
   52,646.78/72,649.80 = 28,768.79/x
3. Step 3: Cross multiply
   52,646.78x = 72,649.80 × 28,768.79
4. Step 4: Simplify right side
   52,646.78x = 2,090,046,476.49
5. Step 5: Solve for x
   x = 2,090,046,476.49/52,646.78
6. Step 6: Final answer
   x = 39,699.42