Finding the Fourth Proportional to 142,424.73, 196,491.02 and 91,423.89

Step by Step Solution

1. Step 1: Write the proportion equation
   142,424.73 : 196,491.02 = 91,423.89 : x
2. Step 2: Convert to fraction form
   142,424.73/196,491.02 = 91,423.89/x
3. Step 3: Cross multiply
   142,424.73x = 196,491.02 × 91,423.89
4. Step 4: Simplify right side
   142,424.73x = 17,963,972,941.35
5. Step 5: Solve for x
   x = 17,963,972,941.35/142,424.73
6. Step 6: Final answer
   x = 126,129.59