Finding the Fourth Proportional to 111,145.37, 153,379.17 and 63,399.51

Step by Step Solution

1. Step 1: Write the proportion equation
   111,145.37 : 153,379.17 = 63,399.51 : x
2. Step 2: Convert to fraction form
   111,145.37/153,379.17 = 63,399.51/x
3. Step 3: Cross multiply
   111,145.37x = 153,379.17 × 63,399.51
4. Step 4: Simplify right side
   111,145.37x = 9,724,164,222.21
5. Step 5: Solve for x
   x = 9,724,164,222.21/111,145.37
6. Step 6: Final answer
   x = 87,490.51