Finding the Fourth Proportional to 78,970.15, 108,908.06 and 52,139.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,970.15 : 108,908.06 = 52,139.76 : x
2. Step 2: Convert to fraction form
   78,970.15/108,908.06 = 52,139.76/x
3. Step 3: Cross multiply
   78,970.15x = 108,908.06 × 52,139.76
4. Step 4: Simplify right side
   78,970.15x = 5,678,440,110.47
5. Step 5: Solve for x
   x = 5,678,440,110.47/78,970.15
6. Step 6: Final answer
   x = 71,906.16