Finding the Fourth Proportional to 111,354.67, 153,669.99 and 66,055.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111,354.67 : 153,669.99 = 66,055.42 : x
2. Step 2: Convert to fraction form
   111,354.67/153,669.99 = 66,055.42/x
3. Step 3: Cross multiply
   111,354.67x = 153,669.99 × 66,055.42
4. Step 4: Simplify right side
   111,354.67x = 10,150,735,730.85
5. Step 5: Solve for x
   x = 10,150,735,730.85/111,354.67
6. Step 6: Final answer
   x = 91,156.80