Finding the Fourth Proportional to 154,144.16, 212,658.72 and 89,602.64

Step by Step Solution

1. Step 1: Write the proportion equation
   154,144.16 : 212,658.72 = 89,602.64 : x
2. Step 2: Convert to fraction form
   154,144.16/212,658.72 = 89,602.64/x
3. Step 3: Cross multiply
   154,144.16x = 212,658.72 × 89,602.64
4. Step 4: Simplify right side
   154,144.16x = 19,054,782,731.02
5. Step 5: Solve for x
   x = 19,054,782,731.02/154,144.16
6. Step 6: Final answer
   x = 123,616.64