Finding the Fourth Proportional to 78,981.30, 118,241.55 and 76,677.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,981.30 : 118,241.55 = 76,677.30 : x
2. Step 2: Convert to fraction form
   78,981.30/118,241.55 = 76,677.30/x
3. Step 3: Cross multiply
   78,981.30x = 118,241.55 × 76,677.30
4. Step 4: Simplify right side
   78,981.30x = 9,066,442,801.82
5. Step 5: Solve for x
   x = 9,066,442,801.82/78,981.30
6. Step 6: Final answer
   x = 114,792.27