Finding the Fourth Proportional to 139,359.78, 192,396.30 and 91,751.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,359.78 : 192,396.30 = 91,751.52 : x
2. Step 2: Convert to fraction form
   139,359.78/192,396.30 = 91,751.52/x
3. Step 3: Cross multiply
   139,359.78x = 192,396.30 × 91,751.52
4. Step 4: Simplify right side
   139,359.78x = 17,652,652,967.38
5. Step 5: Solve for x
   x = 17,652,652,967.38/139,359.78
6. Step 6: Final answer
   x = 126,669.64