Finding the Fourth Proportional to 139,039.76, 191,873.84 and 78,610.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,039.76 : 191,873.84 = 78,610.25 : x
2. Step 2: Convert to fraction form
   139,039.76/191,873.84 = 78,610.25/x
3. Step 3: Cross multiply
   139,039.76x = 191,873.84 × 78,610.25
4. Step 4: Simplify right side
   139,039.76x = 15,083,249,178.44
5. Step 5: Solve for x
   x = 15,083,249,178.44/139,039.76
6. Step 6: Final answer
   x = 108,481.56