Finding the Fourth Proportional to 112,911.77, 155,807.02 and 65,180.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112,911.77 : 155,807.02 = 65,180.50 : x
2. Step 2: Convert to fraction form
   112,911.77/155,807.02 = 65,180.50/x
3. Step 3: Cross multiply
   112,911.77x = 155,807.02 × 65,180.50
4. Step 4: Simplify right side
   112,911.77x = 10,155,579,467.11
5. Step 5: Solve for x
   x = 10,155,579,467.11/112,911.77
6. Step 6: Final answer
   x = 89,942.61