Finding the Fourth Proportional to 90,408.02, 135,610.23 and 28,078.34

Step by Step Solution

1. Step 1: Write the proportion equation
   90,408.02 : 135,610.23 = 28,078.34 : x
2. Step 2: Convert to fraction form
   90,408.02/135,610.23 = 28,078.34/x
3. Step 3: Cross multiply
   90,408.02x = 135,610.23 × 28,078.34
4. Step 4: Simplify right side
   90,408.02x = 3,807,710,145.42
5. Step 5: Solve for x
   x = 3,807,710,145.42/90,408.02
6. Step 6: Final answer
   x = 42,116.95