Finding the Fourth Proportional to 100,067.55, 138,092.72 and 54,744.71

Step by Step Solution

1. Step 1: Write the proportion equation
   100,067.55 : 138,092.72 = 54,744.71 : x
2. Step 2: Convert to fraction form
   100,067.55/138,092.72 = 54,744.71/x
3. Step 3: Cross multiply
   100,067.55x = 138,092.72 × 54,744.71
4. Step 4: Simplify right side
   100,067.55x = 7,559,845,909.51
5. Step 5: Solve for x
   x = 7,559,845,909.51/100,067.55
6. Step 6: Final answer
   x = 75,547.43