Finding the Fourth Proportional to 113,145.36, 156,123.24 and 65,389.49

Step by Step Solution

1. Step 1: Write the proportion equation
   113,145.36 : 156,123.24 = 65,389.49 : x
2. Step 2: Convert to fraction form
   113,145.36/156,123.24 = 65,389.49/x
3. Step 3: Cross multiply
   113,145.36x = 156,123.24 × 65,389.49
4. Step 4: Simplify right side
   113,145.36x = 10,208,818,260.13
5. Step 5: Solve for x
   x = 10,208,818,260.13/113,145.36
6. Step 6: Final answer
   x = 90,227.46