Finding the Fourth Proportional to 111,142.66, 153,448.41 and 99,185.46

Step by Step Solution

1. Step 1: Write the proportion equation
   111,142.66 : 153,448.41 = 99,185.46 : x
2. Step 2: Convert to fraction form
   111,142.66/153,448.41 = 99,185.46/x
3. Step 3: Cross multiply
   111,142.66x = 153,448.41 × 99,185.46
4. Step 4: Simplify right side
   111,142.66x = 15,219,851,132.12
5. Step 5: Solve for x
   x = 15,219,851,132.12/111,142.66
6. Step 6: Final answer
   x = 136,939.78