Finding the Fourth Proportional to 138,164.38, 190,666.84 and 78,548.38

Step by Step Solution

1. Step 1: Write the proportion equation
   138,164.38 : 190,666.84 = 78,548.38 : x
2. Step 2: Convert to fraction form
   138,164.38/190,666.84 = 78,548.38/x
3. Step 3: Cross multiply
   138,164.38x = 190,666.84 × 78,548.38
4. Step 4: Simplify right side
   138,164.38x = 14,976,571,401.72
5. Step 5: Solve for x
   x = 14,976,571,401.72/138,164.38
6. Step 6: Final answer
   x = 108,396.76