Finding the Fourth Proportional to 76,972.32, 106,223.94 and 45,142.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,972.32 : 106,223.94 = 45,142.56 : x
2. Step 2: Convert to fraction form
   76,972.32/106,223.94 = 45,142.56/x
3. Step 3: Cross multiply
   76,972.32x = 106,223.94 × 45,142.56
4. Step 4: Simplify right side
   76,972.32x = 4,795,220,584.89
5. Step 5: Solve for x
   x = 4,795,220,584.89/76,972.32
6. Step 6: Final answer
   x = 62,297.99