Finding the Fourth Proportional to 159,436.89, 220,014.59 and 99,006.23

Step by Step Solution

1. Step 1: Write the proportion equation
   159,436.89 : 220,014.59 = 99,006.23 : x
2. Step 2: Convert to fraction form
   159,436.89/220,014.59 = 99,006.23/x
3. Step 3: Cross multiply
   159,436.89x = 220,014.59 × 99,006.23
4. Step 4: Simplify right side
   159,436.89x = 21,782,815,100.90
5. Step 5: Solve for x
   x = 21,782,815,100.90/159,436.89
6. Step 6: Final answer
   x = 136,623.43