Finding the Fourth Proportional to 113,605.78, 156,776.70 and 65,194.78

Step by Step Solution

1. Step 1: Write the proportion equation
   113,605.78 : 156,776.70 = 65,194.78 : x
2. Step 2: Convert to fraction form
   113,605.78/156,776.70 = 65,194.78/x
3. Step 3: Cross multiply
   113,605.78x = 156,776.70 × 65,194.78
4. Step 4: Simplify right side
   113,605.78x = 10,221,022,465.63
5. Step 5: Solve for x
   x = 10,221,022,465.63/113,605.78
6. Step 6: Final answer
   x = 89,969.21