Finding the Fourth Proportional to 100,062.05, 138,086.72 and 54,739.06

Step by Step Solution

1. Step 1: Write the proportion equation
   100,062.05 : 138,086.72 = 54,739.06 : x
2. Step 2: Convert to fraction form
   100,062.05/138,086.72 = 54,739.06/x
3. Step 3: Cross multiply
   100,062.05x = 138,086.72 × 54,739.06
4. Step 4: Simplify right side
   100,062.05x = 7,558,736,977.59
5. Step 5: Solve for x
   x = 7,558,736,977.59/100,062.05
6. Step 6: Final answer
   x = 75,540.50