Finding the Fourth Proportional to 139,903.39, 193,066.71 and 76,241.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,903.39 : 193,066.71 = 76,241.20 : x
2. Step 2: Convert to fraction form
   139,903.39/193,066.71 = 76,241.20/x
3. Step 3: Cross multiply
   139,903.39x = 193,066.71 × 76,241.20
4. Step 4: Simplify right side
   139,903.39x = 14,719,637,650.45
5. Step 5: Solve for x
   x = 14,719,637,650.45/139,903.39
6. Step 6: Final answer
   x = 105,212.87