Finding the Fourth Proportional to 269,111.10, 403,721.33 and 91,636.05

Step by Step Solution

1. Step 1: Write the proportion equation
   269,111.10 : 403,721.33 = 91,636.05 : x
2. Step 2: Convert to fraction form
   269,111.10/403,721.33 = 91,636.05/x
3. Step 3: Cross multiply
   269,111.10x = 403,721.33 × 91,636.05
4. Step 4: Simplify right side
   269,111.10x = 36,995,427,523.77
5. Step 5: Solve for x
   x = 36,995,427,523.77/269,111.10
6. Step 6: Final answer
   x = 137,472.69