Finding the Fourth Proportional to 139,050.84, 191,788.20 and 91,286.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,050.84 : 191,788.20 = 91,286.76 : x
2. Step 2: Convert to fraction form
   139,050.84/191,788.20 = 91,286.76/x
3. Step 3: Cross multiply
   139,050.84x = 191,788.20 × 91,286.76
4. Step 4: Simplify right side
   139,050.84x = 17,507,723,384.23
5. Step 5: Solve for x
   x = 17,507,723,384.23/139,050.84
6. Step 6: Final answer
   x = 125,908.79