Finding the Fourth Proportional to 105,559.65, 158,338.49 and 45,630.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,559.65 : 158,338.49 = 45,630.50 : x
2. Step 2: Convert to fraction form
   105,559.65/158,338.49 = 45,630.50/x
3. Step 3: Cross multiply
   105,559.65x = 158,338.49 × 45,630.50
4. Step 4: Simplify right side
   105,559.65x = 7,225,063,448.10
5. Step 5: Solve for x
   x = 7,225,063,448.10/105,559.65
6. Step 6: Final answer
   x = 68,445.31