Finding the Fourth Proportional to 111,141.16, 153,446.34 and 99,183.96

Step by Step Solution

1. Step 1: Write the proportion equation
   111,141.16 : 153,446.34 = 99,183.96 : x
2. Step 2: Convert to fraction form
   111,141.16/153,446.34 = 99,183.96/x
3. Step 3: Cross multiply
   111,141.16x = 153,446.34 × 99,183.96
4. Step 4: Simplify right side
   111,141.16x = 15,219,415,648.71
5. Step 5: Solve for x
   x = 15,219,415,648.71/111,141.16
6. Step 6: Final answer
   x = 136,937.71