Finding the Fourth Proportional to 91,018.89, 136,528.38 and 28,694.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91,018.89 : 136,528.38 = 28,694.25 : x
2. Step 2: Convert to fraction form
   91,018.89/136,528.38 = 28,694.25/x
3. Step 3: Cross multiply
   91,018.89x = 136,528.38 × 28,694.25
4. Step 4: Simplify right side
   91,018.89x = 3,917,579,467.82
5. Step 5: Solve for x
   x = 3,917,579,467.82/91,018.89
6. Step 6: Final answer
   x = 43,041.39