Finding the Fourth Proportional to 113,856.40, 157,109.71 and 66,100.82

Step by Step Solution

1. Step 1: Write the proportion equation
   113,856.40 : 157,109.71 = 66,100.82 : x
2. Step 2: Convert to fraction form
   113,856.40/157,109.71 = 66,100.82/x
3. Step 3: Cross multiply
   113,856.40x = 157,109.71 × 66,100.82
4. Step 4: Simplify right side
   113,856.40x = 10,385,080,660.96
5. Step 5: Solve for x
   x = 10,385,080,660.96/113,856.40
6. Step 6: Final answer
   x = 91,212.09