Finding the Fourth Proportional to 111,441.24, 153,783.90 and 61,139.16

Step by Step Solution

1. Step 1: Write the proportion equation
   111,441.24 : 153,783.90 = 61,139.16 : x
2. Step 2: Convert to fraction form
   111,441.24/153,783.90 = 61,139.16/x
3. Step 3: Cross multiply
   111,441.24x = 153,783.90 × 61,139.16
4. Step 4: Simplify right side
   111,441.24x = 9,402,218,467.52
5. Step 5: Solve for x
   x = 9,402,218,467.52/111,441.24
6. Step 6: Final answer
   x = 84,369.29