Finding the Fourth Proportional to 154,221.98, 212,826.89 and 89,706.69

Step by Step Solution

1. Step 1: Write the proportion equation
   154,221.98 : 212,826.89 = 89,706.69 : x
2. Step 2: Convert to fraction form
   154,221.98/212,826.89 = 89,706.69/x
3. Step 3: Cross multiply
   154,221.98x = 212,826.89 × 89,706.69
4. Step 4: Simplify right side
   154,221.98x = 19,091,996,069.16
5. Step 5: Solve for x
   x = 19,091,996,069.16/154,221.98
6. Step 6: Final answer
   x = 123,795.56