Finding the Fourth Proportional to 99,695.54, 137,579.31 and 54,372.67

Step by Step Solution

1. Step 1: Write the proportion equation
   99,695.54 : 137,579.31 = 54,372.67 : x
2. Step 2: Convert to fraction form
   99,695.54/137,579.31 = 54,372.67/x
3. Step 3: Cross multiply
   99,695.54x = 137,579.31 × 54,372.67
4. Step 4: Simplify right side
   99,695.54x = 7,480,554,077.51
5. Step 5: Solve for x
   x = 7,480,554,077.51/99,695.54
6. Step 6: Final answer
   x = 75,033.99