Finding the Fourth Proportional to 113,090.45, 156,053.78 and 65,342.78

Step by Step Solution

1. Step 1: Write the proportion equation
   113,090.45 : 156,053.78 = 65,342.78 : x
2. Step 2: Convert to fraction form
   113,090.45/156,053.78 = 65,342.78/x
3. Step 3: Cross multiply
   113,090.45x = 156,053.78 × 65,342.78
4. Step 4: Simplify right side
   113,090.45x = 10,196,986,707.73
5. Step 5: Solve for x
   x = 10,196,986,707.73/113,090.45
6. Step 6: Final answer
   x = 90,166.65