Finding the Fourth Proportional to 103,321.60, 154,961.99 and 28,422.42

Step by Step Solution

1. Step 1: Write the proportion equation
   103,321.60 : 154,961.99 = 28,422.42 : x
2. Step 2: Convert to fraction form
   103,321.60/154,961.99 = 28,422.42/x
3. Step 3: Cross multiply
   103,321.60x = 154,961.99 × 28,422.42
4. Step 4: Simplify right side
   103,321.60x = 4,404,394,763.82
5. Step 5: Solve for x
   x = 4,404,394,763.82/103,321.60
6. Step 6: Final answer
   x = 42,628.02