Finding the Fourth Proportional to 181,630.89, 272,446.56 and 86,838.78

Step by Step Solution

1. Step 1: Write the proportion equation
   181,630.89 : 272,446.56 = 86,838.78 : x
2. Step 2: Convert to fraction form
   181,630.89/272,446.56 = 86,838.78/x
3. Step 3: Cross multiply
   181,630.89x = 272,446.56 × 86,838.78
4. Step 4: Simplify right side
   181,630.89x = 23,658,926,885.60
5. Step 5: Solve for x
   x = 23,658,926,885.60/181,630.89
6. Step 6: Final answer
   x = 130,258.28