Finding the Fourth Proportional to 78,948.05, 108,945.09 and 43,139.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,948.05 : 108,945.09 = 43,139.30 : x
2. Step 2: Convert to fraction form
   78,948.05/108,945.09 = 43,139.30/x
3. Step 3: Cross multiply
   78,948.05x = 108,945.09 × 43,139.30
4. Step 4: Simplify right side
   78,948.05x = 4,699,814,376.31
5. Step 5: Solve for x
   x = 4,699,814,376.31/78,948.05
6. Step 6: Final answer
   x = 59,530.47