Finding the Fourth Proportional to 111,687.93, 167,531.76 and 45,128.04

Step by Step Solution

1. Step 1: Write the proportion equation
   111,687.93 : 167,531.76 = 45,128.04 : x
2. Step 2: Convert to fraction form
   111,687.93/167,531.76 = 45,128.04/x
3. Step 3: Cross multiply
   111,687.93x = 167,531.76 × 45,128.04
4. Step 4: Simplify right side
   111,687.93x = 7,560,379,338.31
5. Step 5: Solve for x
   x = 7,560,379,338.31/111,687.93
6. Step 6: Final answer
   x = 67,692.00