Finding the Fourth Proportional to 113,444.58, 156,562.56 and 65,698.78

Step by Step Solution

1. Step 1: Write the proportion equation
   113,444.58 : 156,562.56 = 65,698.78 : x
2. Step 2: Convert to fraction form
   113,444.58/156,562.56 = 65,698.78/x
3. Step 3: Cross multiply
   113,444.58x = 156,562.56 × 65,698.78
4. Step 4: Simplify right side
   113,444.58x = 10,285,969,185.68
5. Step 5: Solve for x
   x = 10,285,969,185.68/113,444.58
6. Step 6: Final answer
   x = 90,669.55