Finding the Fourth Proportional to 113,586.71, 156,749.78 and 65,867.78

Step by Step Solution

1. Step 1: Write the proportion equation
   113,586.71 : 156,749.78 = 65,867.78 : x
2. Step 2: Convert to fraction form
   113,586.71/156,749.78 = 65,867.78/x
3. Step 3: Cross multiply
   113,586.71x = 156,749.78 × 65,867.78
4. Step 4: Simplify right side
   113,586.71x = 10,324,760,580.63
5. Step 5: Solve for x
   x = 10,324,760,580.63/113,586.71
6. Step 6: Final answer
   x = 90,897.62