Finding the Fourth Proportional to 139,040.72, 191,774.27 and 91,276.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,040.72 : 191,774.27 = 91,276.64 : x
2. Step 2: Convert to fraction form
   139,040.72/191,774.27 = 91,276.64/x
3. Step 3: Cross multiply
   139,040.72x = 191,774.27 × 91,276.64
4. Step 4: Simplify right side
   139,040.72x = 17,504,509,588.80
5. Step 5: Solve for x
   x = 17,504,509,588.80/139,040.72
6. Step 6: Final answer
   x = 125,894.85