Finding the Fourth Proportional to 99,963.76, 137,953.70 and 54,644.82

Step by Step Solution

1. Step 1: Write the proportion equation
   99,963.76 : 137,953.70 = 54,644.82 : x
2. Step 2: Convert to fraction form
   99,963.76/137,953.70 = 54,644.82/x
3. Step 3: Cross multiply
   99,963.76x = 137,953.70 × 54,644.82
4. Step 4: Simplify right side
   99,963.76x = 7,538,455,104.83
5. Step 5: Solve for x
   x = 7,538,455,104.83/99,963.76
6. Step 6: Final answer
   x = 75,411.88