Finding the Fourth Proportional to 111,580.78, 153,936.94 and 71,284.08

Step by Step Solution

1. Step 1: Write the proportion equation
   111,580.78 : 153,936.94 = 71,284.08 : x
2. Step 2: Convert to fraction form
   111,580.78/153,936.94 = 71,284.08/x
3. Step 3: Cross multiply
   111,580.78x = 153,936.94 × 71,284.08
4. Step 4: Simplify right side
   111,580.78x = 10,973,253,145.92
5. Step 5: Solve for x
   x = 10,973,253,145.92/111,580.78
6. Step 6: Final answer
   x = 98,343.58