Finding the Fourth Proportional to 70,922.28, 106,311.59 and 45,978.13

Step by Step Solution

1. Step 1: Write the proportion equation
   70,922.28 : 106,311.59 = 45,978.13 : x
2. Step 2: Convert to fraction form
   70,922.28/106,311.59 = 45,978.13/x
3. Step 3: Cross multiply
   70,922.28x = 106,311.59 × 45,978.13
4. Step 4: Simplify right side
   70,922.28x = 4,888,008,180.94
5. Step 5: Solve for x
   x = 4,888,008,180.94/70,922.28
6. Step 6: Final answer
   x = 68,920.63