Finding the Fourth Proportional to 78,949.07, 118,211.39 and 60,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,949.07 : 118,211.39 = 60,139.50 : x
2. Step 2: Convert to fraction form
   78,949.07/118,211.39 = 60,139.50/x
3. Step 3: Cross multiply
   78,949.07x = 118,211.39 × 60,139.50
4. Step 4: Simplify right side
   78,949.07x = 7,109,173,888.91
5. Step 5: Solve for x
   x = 7,109,173,888.91/78,949.07
6. Step 6: Final answer
   x = 90,047.60