Finding the Fourth Proportional to 139,984.60, 193,123.60 and 86,176.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,984.60 : 193,123.60 = 86,176.12 : x
2. Step 2: Convert to fraction form
   139,984.60/193,123.60 = 86,176.12/x
3. Step 3: Cross multiply
   139,984.60x = 193,123.60 × 86,176.12
4. Step 4: Simplify right side
   139,984.60x = 16,642,642,528.43
5. Step 5: Solve for x
   x = 16,642,642,528.43/139,984.60
6. Step 6: Final answer
   x = 118,889.10