Finding the Fourth Proportional to 142,607.50, 196,931.70 and 91,708.62

Step by Step Solution

1. Step 1: Write the proportion equation
   142,607.50 : 196,931.70 = 91,708.62 : x
2. Step 2: Convert to fraction form
   142,607.50/196,931.70 = 91,708.62/x
3. Step 3: Cross multiply
   142,607.50x = 196,931.70 × 91,708.62
4. Step 4: Simplify right side
   142,607.50x = 18,060,334,441.25
5. Step 5: Solve for x
   x = 18,060,334,441.25/142,607.50
6. Step 6: Final answer
   x = 126,643.65