Finding the Fourth Proportional to 139,039.97, 191,773.23 and 91,275.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,039.97 : 191,773.23 = 91,275.89 : x
2. Step 2: Convert to fraction form
   139,039.97/191,773.23 = 91,275.89/x
3. Step 3: Cross multiply
   139,039.97x = 191,773.23 × 91,275.89
4. Step 4: Simplify right side
   139,039.97x = 17,504,271,287.56
5. Step 5: Solve for x
   x = 17,504,271,287.56/139,039.97
6. Step 6: Final answer
   x = 125,893.81