Finding the Fourth Proportional to 99,185.61, 136,875.72 and 53,863.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,185.61 : 136,875.72 = 53,863.28 : x
2. Step 2: Convert to fraction form
   99,185.61/136,875.72 = 53,863.28/x
3. Step 3: Cross multiply
   99,185.61x = 136,875.72 × 53,863.28
4. Step 4: Simplify right side
   99,185.61x = 7,372,575,262.45
5. Step 5: Solve for x
   x = 7,372,575,262.45/99,185.61
6. Step 6: Final answer
   x = 74,331.09