Finding the Fourth Proportional to 79,621.31, 109,882.06 and 45,640.32

Step by Step Solution

1. Step 1: Write the proportion equation
   79,621.31 : 109,882.06 = 45,640.32 : x
2. Step 2: Convert to fraction form
   79,621.31/109,882.06 = 45,640.32/x
3. Step 3: Cross multiply
   79,621.31x = 109,882.06 × 45,640.32
4. Step 4: Simplify right side
   79,621.31x = 5,015,052,380.66
5. Step 5: Solve for x
   x = 5,015,052,380.66/79,621.31
6. Step 6: Final answer
   x = 62,986.31