Finding the Fourth Proportional to 78,749.67, 108,674.28 and 42,939.59

Step by Step Solution

1. Step 1: Write the proportion equation
   78,749.67 : 108,674.28 = 42,939.59 : x
2. Step 2: Convert to fraction form
   78,749.67/108,674.28 = 42,939.59/x
3. Step 3: Cross multiply
   78,749.67x = 108,674.28 × 42,939.59
4. Step 4: Simplify right side
   78,749.67x = 4,666,428,483.37
5. Step 5: Solve for x
   x = 4,666,428,483.37/78,749.67
6. Step 6: Final answer
   x = 59,256.48