Finding the Fourth Proportional to 113,412.99, 156,499.74 and 65,669.55

Step by Step Solution

1. Step 1: Write the proportion equation
   113,412.99 : 156,499.74 = 65,669.55 : x
2. Step 2: Convert to fraction form
   113,412.99/156,499.74 = 65,669.55/x
3. Step 3: Cross multiply
   113,412.99x = 156,499.74 × 65,669.55
4. Step 4: Simplify right side
   113,412.99x = 10,277,267,500.92
5. Step 5: Solve for x
   x = 10,277,267,500.92/113,412.99
6. Step 6: Final answer
   x = 90,618.08