Finding the Fourth Proportional to 154,100.78, 212,654.24 and 90,437.22

Step by Step Solution

1. Step 1: Write the proportion equation
   154,100.78 : 212,654.24 = 90,437.22 : x
2. Step 2: Convert to fraction form
   154,100.78/212,654.24 = 90,437.22/x
3. Step 3: Cross multiply
   154,100.78x = 212,654.24 × 90,437.22
4. Step 4: Simplify right side
   154,100.78x = 19,231,858,286.81
5. Step 5: Solve for x
   x = 19,231,858,286.81/154,100.78
6. Step 6: Final answer
   x = 124,800.53