Finding the Fourth Proportional to 78,530.45, 108,371.94 and 42,720.37

Step by Step Solution

1. Step 1: Write the proportion equation
   78,530.45 : 108,371.94 = 42,720.37 : x
2. Step 2: Convert to fraction form
   78,530.45/108,371.94 = 42,720.37/x
3. Step 3: Cross multiply
   78,530.45x = 108,371.94 × 42,720.37
4. Step 4: Simplify right side
   78,530.45x = 4,629,689,374.42
5. Step 5: Solve for x
   x = 4,629,689,374.42/78,530.45
6. Step 6: Final answer
   x = 58,954.07