Finding the Fourth Proportional to 139,906.16, 193,064.86 and 76,242.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139,906.16 : 193,064.86 = 76,242.59 : x
2. Step 2: Convert to fraction form
   139,906.16/193,064.86 = 76,242.59/x
3. Step 3: Cross multiply
   139,906.16x = 193,064.86 × 76,242.59
4. Step 4: Simplify right side
   139,906.16x = 14,719,764,964.39
5. Step 5: Solve for x
   x = 14,719,764,964.39/139,906.16
6. Step 6: Final answer
   x = 105,211.70