Finding the Fourth Proportional to 78,457.49, 108,271.72 and 42,647.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,457.49 : 108,271.72 = 42,647.50 : x
2. Step 2: Convert to fraction form
   78,457.49/108,271.72 = 42,647.50/x
3. Step 3: Cross multiply
   78,457.49x = 108,271.72 × 42,647.50
4. Step 4: Simplify right side
   78,457.49x = 4,617,518,178.70
5. Step 5: Solve for x
   x = 4,617,518,178.70/78,457.49
6. Step 6: Final answer
   x = 58,853.76