Finding the Fourth Proportional to 9,961.91, 13,746.93 and 5,486.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,961.91 : 13,746.93 = 5,486.05 : x
2. Step 2: Convert to fraction form
   9,961.91/13,746.93 = 5,486.05/x
3. Step 3: Cross multiply
   9,961.91x = 13,746.93 × 5,486.05
4. Step 4: Simplify right side
   9,961.91x = 75,416,345.33
5. Step 5: Solve for x
   x = 75,416,345.33/9,961.91
6. Step 6: Final answer
   x = 7,570.47