Finding the Fourth Proportional to 139,052.84, 191,790.96 and 91,288.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,052.84 : 191,790.96 = 91,288.76 : x
2. Step 2: Convert to fraction form
   139,052.84/191,790.96 = 91,288.76/x
3. Step 3: Cross multiply
   139,052.84x = 191,790.96 × 91,288.76
4. Step 4: Simplify right side
   139,052.84x = 17,508,358,917.61
5. Step 5: Solve for x
   x = 17,508,358,917.61/139,052.84
6. Step 6: Final answer
   x = 125,911.55