Finding the Fourth Proportional to 113,606.57, 156,777.69 and 65,888.21

Step by Step Solution

1. Step 1: Write the proportion equation
   113,606.57 : 156,777.69 = 65,888.21 : x
2. Step 2: Convert to fraction form
   113,606.57/156,777.69 = 65,888.21/x
3. Step 3: Cross multiply
   113,606.57x = 156,777.69 × 65,888.21
4. Step 4: Simplify right side
   113,606.57x = 10,329,800,578.15
5. Step 5: Solve for x
   x = 10,329,800,578.15/113,606.57
6. Step 6: Final answer
   x = 90,926.09