Finding the Fourth Proportional to 78,279.78, 117,272.04 and 60,663.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,279.78 : 117,272.04 = 60,663.50 : x
2. Step 2: Convert to fraction form
   78,279.78/117,272.04 = 60,663.50/x
3. Step 3: Cross multiply
   78,279.78x = 117,272.04 × 60,663.50
4. Step 4: Simplify right side
   78,279.78x = 7,114,131,812.18
5. Step 5: Solve for x
   x = 7,114,131,812.18/78,279.78
6. Step 6: Final answer
   x = 90,880.84