Finding the Fourth Proportional to 112,989, 155,865.96 and 67,021.91

Step by Step Solution

1. Step 1: Write the proportion equation
   112,989 : 155,865.96 = 67,021.91 : x
2. Step 2: Convert to fraction form
   112,989/155,865.96 = 67,021.91/x
3. Step 3: Cross multiply
   112,989x = 155,865.96 × 67,021.91
4. Step 4: Simplify right side
   112,989x = 10,446,433,563.85
5. Step 5: Solve for x
   x = 10,446,433,563.85/112,989
6. Step 6: Final answer
   x = 92,455.31