Finding the Fourth Proportional to 139,524.48, 192,560.04 and 78,287.58

Step by Step Solution

1. Step 1: Write the proportion equation
   139,524.48 : 192,560.04 = 78,287.58 : x
2. Step 2: Convert to fraction form
   139,524.48/192,560.04 = 78,287.58/x
3. Step 3: Cross multiply
   139,524.48x = 192,560.04 × 78,287.58
4. Step 4: Simplify right side
   139,524.48x = 15,075,059,536.30
5. Step 5: Solve for x
   x = 15,075,059,536.30/139,524.48
6. Step 6: Final answer
   x = 108,045.98