Finding the Fourth Proportional to 99,826.41, 137,756.51 and 54,506.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99,826.41 : 137,756.51 = 54,506.31 : x
2. Step 2: Convert to fraction form
   99,826.41/137,756.51 = 54,506.31/x
3. Step 3: Cross multiply
   99,826.41x = 137,756.51 × 54,506.31
4. Step 4: Simplify right side
   99,826.41x = 7,508,598,760.46
5. Step 5: Solve for x
   x = 7,508,598,760.46/99,826.41
6. Step 6: Final answer
   x = 75,216.55