Finding the Fourth Proportional to 78,448.24, 108,259.08 and 42,638.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,448.24 : 108,259.08 = 42,638.56 : x
2. Step 2: Convert to fraction form
   78,448.24/108,259.08 = 42,638.56/x
3. Step 3: Cross multiply
   78,448.24x = 108,259.08 × 42,638.56
4. Step 4: Simplify right side
   78,448.24x = 4,616,011,278.12
5. Step 5: Solve for x
   x = 4,616,011,278.12/78,448.24
6. Step 6: Final answer
   x = 58,841.49