Finding the Fourth Proportional to 91,018.64, 136,527.94 and 28,689.12

Step by Step Solution

1. Step 1: Write the proportion equation
   91,018.64 : 136,527.94 = 28,689.12 : x
2. Step 2: Convert to fraction form
   91,018.64/136,527.94 = 28,689.12/x
3. Step 3: Cross multiply
   91,018.64x = 136,527.94 × 28,689.12
4. Step 4: Simplify right side
   91,018.64x = 3,916,866,454.01
5. Step 5: Solve for x
   x = 3,916,866,454.01/91,018.64
6. Step 6: Final answer
   x = 43,033.67