Finding the Fourth Proportional to 111,591.76, 154,018.98 and 66,294.91

Step by Step Solution

1. Step 1: Write the proportion equation
   111,591.76 : 154,018.98 = 66,294.91 : x
2. Step 2: Convert to fraction form
   111,591.76/154,018.98 = 66,294.91/x
3. Step 3: Cross multiply
   111,591.76x = 154,018.98 × 66,294.91
4. Step 4: Simplify right side
   111,591.76x = 10,210,673,647.30
5. Step 5: Solve for x
   x = 10,210,673,647.30/111,591.76
6. Step 6: Final answer
   x = 91,500.25