Finding the Fourth Proportional to 78,665.75, 117,927.76 and 28,710.79

Step by Step Solution

1. Step 1: Write the proportion equation
   78,665.75 : 117,927.76 = 28,710.79 : x
2. Step 2: Convert to fraction form
   78,665.75/117,927.76 = 28,710.79/x
3. Step 3: Cross multiply
   78,665.75x = 117,927.76 × 28,710.79
4. Step 4: Simplify right side
   78,665.75x = 3,385,799,152.53
5. Step 5: Solve for x
   x = 3,385,799,152.53/78,665.75
6. Step 6: Final answer
   x = 43,040.32