Finding the Fourth Proportional to 139,867.45, 193,019.30 and 76,205.23

Step by Step Solution

1. Step 1: Write the proportion equation
   139,867.45 : 193,019.30 = 76,205.23 : x
2. Step 2: Convert to fraction form
   139,867.45/193,019.30 = 76,205.23/x
3. Step 3: Cross multiply
   139,867.45x = 193,019.30 × 76,205.23
4. Step 4: Simplify right side
   139,867.45x = 14,709,080,150.94
5. Step 5: Solve for x
   x = 14,709,080,150.94/139,867.45
6. Step 6: Final answer
   x = 105,164.43