Finding the Fourth Proportional to 99,364.50, 137,123.37 and 54,042.48

Step by Step Solution

1. Step 1: Write the proportion equation
   99,364.50 : 137,123.37 = 54,042.48 : x
2. Step 2: Convert to fraction form
   99,364.50/137,123.37 = 54,042.48/x
3. Step 3: Cross multiply
   99,364.50x = 137,123.37 × 54,042.48
4. Step 4: Simplify right side
   99,364.50x = 7,410,486,980.76
5. Step 5: Solve for x
   x = 7,410,486,980.76/99,364.50
6. Step 6: Final answer
   x = 74,578.82