Finding the Fourth Proportional to 111,411.48, 153,722.97 and 66,066.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111,411.48 : 153,722.97 = 66,066.42 : x
2. Step 2: Convert to fraction form
   111,411.48/153,722.97 = 66,066.42/x
3. Step 3: Cross multiply
   111,411.48x = 153,722.97 × 66,066.42
4. Step 4: Simplify right side
   111,411.48x = 10,155,926,299.67
5. Step 5: Solve for x
   x = 10,155,926,299.67/111,411.48
6. Step 6: Final answer
   x = 91,156.91