Finding the Fourth Proportional to 111,159.10, 153,488.01 and 102,658.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111,159.10 : 153,488.01 = 102,658.12 : x
2. Step 2: Convert to fraction form
   111,159.10/153,488.01 = 102,658.12/x
3. Step 3: Cross multiply
   111,159.10x = 153,488.01 × 102,658.12
4. Step 4: Simplify right side
   111,159.10x = 15,756,790,550.39
5. Step 5: Solve for x
   x = 15,756,790,550.39/111,159.10
6. Step 6: Final answer
   x = 141,749.89