Finding the Fourth Proportional to 78,457.09, 108,269.51 and 42,648

Step by Step Solution

1. Step 1: Write the proportion equation
   78,457.09 : 108,269.51 = 42,648 : x
2. Step 2: Convert to fraction form
   78,457.09/108,269.51 = 42,648/x
3. Step 3: Cross multiply
   78,457.09x = 108,269.51 × 42,648
4. Step 4: Simplify right side
   78,457.09x = 4,617,477,849.24
5. Step 5: Solve for x
   x = 4,617,477,849.24/78,457.09
6. Step 6: Final answer
   x = 58,853.55