Finding the Fourth Proportional to 113,535.76, 156,664.56 and 65,778.88

Step by Step Solution

1. Step 1: Write the proportion equation
   113,535.76 : 156,664.56 = 65,778.88 : x
2. Step 2: Convert to fraction form
   113,535.76/156,664.56 = 65,778.88/x
3. Step 3: Cross multiply
   113,535.76x = 156,664.56 × 65,778.88
4. Step 4: Simplify right side
   113,535.76x = 10,305,219,292.49
5. Step 5: Solve for x
   x = 10,305,219,292.49/113,535.76
6. Step 6: Final answer
   x = 90,766.29