Finding the Fourth Proportional to 99,406, 137,180.28 and 54,694

Step by Step Solution

1. Step 1: Write the proportion equation
   99,406 : 137,180.28 = 54,694 : x
2. Step 2: Convert to fraction form
   99,406/137,180.28 = 54,694/x
3. Step 3: Cross multiply
   99,406x = 137,180.28 × 54,694
4. Step 4: Simplify right side
   99,406x = 7,502,938,234.32
5. Step 5: Solve for x
   x = 7,502,938,234.32/99,406
6. Step 6: Final answer
   x = 75,477.72