Finding the Fourth Proportional to 40,026.18, 55,207.53 and 30,578.34

Step by Step Solution

1. Step 1: Write the proportion equation
   40,026.18 : 55,207.53 = 30,578.34 : x
2. Step 2: Convert to fraction form
   40,026.18/55,207.53 = 30,578.34/x
3. Step 3: Cross multiply
   40,026.18x = 55,207.53 × 30,578.34
4. Step 4: Simplify right side
   40,026.18x = 1,688,154,622.90
5. Step 5: Solve for x
   x = 1,688,154,622.90/40,026.18
6. Step 6: Final answer
   x = 42,176.26