Finding the Fourth Proportional to 268,264.72, 402,296.52 and 78,685.84

Step by Step Solution

1. Step 1: Write the proportion equation
   268,264.72 : 402,296.52 = 78,685.84 : x
2. Step 2: Convert to fraction form
   268,264.72/402,296.52 = 78,685.84/x
3. Step 3: Cross multiply
   268,264.72x = 402,296.52 × 78,685.84
4. Step 4: Simplify right side
   268,264.72x = 31,655,039,605.28
5. Step 5: Solve for x
   x = 31,655,039,605.28/268,264.72
6. Step 6: Final answer
   x = 117,999.26