Finding the Fourth Proportional to 100,801.67, 139,103.71 and 54,859.34

Step by Step Solution

1. Step 1: Write the proportion equation
   100,801.67 : 139,103.71 = 54,859.34 : x
2. Step 2: Convert to fraction form
   100,801.67/139,103.71 = 54,859.34/x
3. Step 3: Cross multiply
   100,801.67x = 139,103.71 × 54,859.34
4. Step 4: Simplify right side
   100,801.67x = 7,631,137,932.76
5. Step 5: Solve for x
   x = 7,631,137,932.76/100,801.67
6. Step 6: Final answer
   x = 75,704.48