Finding the Fourth Proportional to 139,905.29, 193,014.50 and 86,096.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,905.29 : 193,014.50 = 86,096.89 : x
2. Step 2: Convert to fraction form
   139,905.29/193,014.50 = 86,096.89/x
3. Step 3: Cross multiply
   139,905.29x = 193,014.50 × 86,096.89
4. Step 4: Simplify right side
   139,905.29x = 16,617,947,744.42
5. Step 5: Solve for x
   x = 16,617,947,744.42/139,905.29
6. Step 6: Final answer
   x = 118,779.98