Finding the Fourth Proportional to 83,506.78, 115,239.72 and 49,972.78

Step by Step Solution

1. Step 1: Write the proportion equation
   83,506.78 : 115,239.72 = 49,972.78 : x
2. Step 2: Convert to fraction form
   83,506.78/115,239.72 = 49,972.78/x
3. Step 3: Cross multiply
   83,506.78x = 115,239.72 × 49,972.78
4. Step 4: Simplify right side
   83,506.78x = 5,758,849,174.82
5. Step 5: Solve for x
   x = 5,758,849,174.82/83,506.78
6. Step 6: Final answer
   x = 68,962.65