Finding the Fourth Proportional to 78,890.96, 118,248.78 and 60,109.07

Step by Step Solution

1. Step 1: Write the proportion equation
   78,890.96 : 118,248.78 = 60,109.07 : x
2. Step 2: Convert to fraction form
   78,890.96/118,248.78 = 60,109.07/x
3. Step 3: Cross multiply
   78,890.96x = 118,248.78 × 60,109.07
4. Step 4: Simplify right side
   78,890.96x = 7,107,824,194.43
5. Step 5: Solve for x
   x = 7,107,824,194.43/78,890.96
6. Step 6: Final answer
   x = 90,096.81