Finding the Fourth Proportional to 75,680.16, 104,434.56 and 42,144

Step by Step Solution

1. Step 1: Write the proportion equation
   75,680.16 : 104,434.56 = 42,144 : x
2. Step 2: Convert to fraction form
   75,680.16/104,434.56 = 42,144/x
3. Step 3: Cross multiply
   75,680.16x = 104,434.56 × 42,144
4. Step 4: Simplify right side
   75,680.16x = 4,401,290,096.64
5. Step 5: Solve for x
   x = 4,401,290,096.64/75,680.16
6. Step 6: Final answer
   x = 58,156.46