Finding the Fourth Proportional to 99,855.98, 137,802.36 and 54,535.30

Step by Step Solution

1. Step 1: Write the proportion equation
   99,855.98 : 137,802.36 = 54,535.30 : x
2. Step 2: Convert to fraction form
   99,855.98/137,802.36 = 54,535.30/x
3. Step 3: Cross multiply
   99,855.98x = 137,802.36 × 54,535.30
4. Step 4: Simplify right side
   99,855.98x = 7,515,093,043.31
5. Step 5: Solve for x
   x = 7,515,093,043.31/99,855.98
6. Step 6: Final answer
   x = 75,259.32