Finding the Fourth Proportional to 56,086.78, 84,111.95 and 18,636.79

Step by Step Solution

1. Step 1: Write the proportion equation
   56,086.78 : 84,111.95 = 18,636.79 : x
2. Step 2: Convert to fraction form
   56,086.78/84,111.95 = 18,636.79/x
3. Step 3: Cross multiply
   56,086.78x = 84,111.95 × 18,636.79
4. Step 4: Simplify right side
   56,086.78x = 1,567,576,748.64
5. Step 5: Solve for x
   x = 1,567,576,748.64/56,086.78
6. Step 6: Final answer
   x = 27,949.13