Finding the Fourth Proportional to 202,786.15, 279,839.59 and 112,139.59

Step by Step Solution

1. Step 1: Write the proportion equation
   202,786.15 : 279,839.59 = 112,139.59 : x
2. Step 2: Convert to fraction form
   202,786.15/279,839.59 = 112,139.59/x
3. Step 3: Cross multiply
   202,786.15x = 279,839.59 × 112,139.59
4. Step 4: Simplify right side
   202,786.15x = 31,381,096,888.37
5. Step 5: Solve for x
   x = 31,381,096,888.37/202,786.15
6. Step 6: Final answer
   x = 154,749.70