Finding the Fourth Proportional to 139,111.68, 208,664.28 and 75,993.24

Step by Step Solution

1. Step 1: Write the proportion equation
   139,111.68 : 208,664.28 = 75,993.24 : x
2. Step 2: Convert to fraction form
   139,111.68/208,664.28 = 75,993.24/x
3. Step 3: Cross multiply
   139,111.68x = 208,664.28 × 75,993.24
4. Step 4: Simplify right side
   139,111.68x = 15,857,074,709.47
5. Step 5: Solve for x
   x = 15,857,074,709.47/139,111.68
6. Step 6: Final answer
   x = 113,988.09