Finding the Fourth Proportional to 154,196.02, 212,849.40 and 100,494.28

Step by Step Solution

1. Step 1: Write the proportion equation
   154,196.02 : 212,849.40 = 100,494.28 : x
2. Step 2: Convert to fraction form
   154,196.02/212,849.40 = 100,494.28/x
3. Step 3: Cross multiply
   154,196.02x = 212,849.40 × 100,494.28
4. Step 4: Simplify right side
   154,196.02x = 21,390,147,201.43
5. Step 5: Solve for x
   x = 21,390,147,201.43/154,196.02
6. Step 6: Final answer
   x = 138,720.49