Finding the Fourth Proportional to 142,748.06, 197,084.76 and 91,783.68

Step by Step Solution

1. Step 1: Write the proportion equation
   142,748.06 : 197,084.76 = 91,783.68 : x
2. Step 2: Convert to fraction form
   142,748.06/197,084.76 = 91,783.68/x
3. Step 3: Cross multiply
   142,748.06x = 197,084.76 × 91,783.68
4. Step 4: Simplify right side
   142,748.06x = 18,089,164,544.72
5. Step 5: Solve for x
   x = 18,089,164,544.72/142,748.06
6. Step 6: Final answer
   x = 126,720.91