Finding the Fourth Proportional to 99,288.16, 137,018.59 and 53,966.25

Step by Step Solution

1. Step 1: Write the proportion equation
   99,288.16 : 137,018.59 = 53,966.25 : x
2. Step 2: Convert to fraction form
   99,288.16/137,018.59 = 53,966.25/x
3. Step 3: Cross multiply
   99,288.16x = 137,018.59 × 53,966.25
4. Step 4: Simplify right side
   99,288.16x = 7,394,379,347.67
5. Step 5: Solve for x
   x = 7,394,379,347.67/99,288.16
6. Step 6: Final answer
   x = 74,473.93