Finding the Fourth Proportional to 78,978.72, 108,959.44 and 45,426.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,978.72 : 108,959.44 = 45,426.72 : x
2. Step 2: Convert to fraction form
   78,978.72/108,959.44 = 45,426.72/x
3. Step 3: Cross multiply
   78,978.72x = 108,959.44 × 45,426.72
4. Step 4: Simplify right side
   78,978.72x = 4,949,669,972.24
5. Step 5: Solve for x
   x = 4,949,669,972.24/78,978.72
6. Step 6: Final answer
   x = 62,670.93