Finding the Fourth Proportional to 142,277.75, 196,434.82 and 91,312.45

Step by Step Solution

1. Step 1: Write the proportion equation
   142,277.75 : 196,434.82 = 91,312.45 : x
2. Step 2: Convert to fraction form
   142,277.75/196,434.82 = 91,312.45/x
3. Step 3: Cross multiply
   142,277.75x = 196,434.82 × 91,312.45
4. Step 4: Simplify right side
   142,277.75x = 17,936,944,302.56
5. Step 5: Solve for x
   x = 17,936,944,302.56/142,277.75
6. Step 6: Final answer
   x = 126,069.92