Finding the Fourth Proportional to 136,648.40, 188,574.31 and 76,219

Step by Step Solution

1. Step 1: Write the proportion equation
   136,648.40 : 188,574.31 = 76,219 : x
2. Step 2: Convert to fraction form
   136,648.40/188,574.31 = 76,219/x
3. Step 3: Cross multiply
   136,648.40x = 188,574.31 × 76,219
4. Step 4: Simplify right side
   136,648.40x = 14,372,945,333.89
5. Step 5: Solve for x
   x = 14,372,945,333.89/136,648.40
6. Step 6: Final answer
   x = 105,181.95