Finding the Fourth Proportional to 99,313.16, 137,052.72 and 53,991.48

Step by Step Solution

1. Step 1: Write the proportion equation
   99,313.16 : 137,052.72 = 53,991.48 : x
2. Step 2: Convert to fraction form
   99,313.16/137,052.72 = 53,991.48/x
3. Step 3: Cross multiply
   99,313.16x = 137,052.72 × 53,991.48
4. Step 4: Simplify right side
   99,313.16x = 7,399,679,190.83
5. Step 5: Solve for x
   x = 7,399,679,190.83/99,313.16
6. Step 6: Final answer
   x = 74,508.55