Finding the Fourth Proportional to 10,085.91, 13,918.89 and 5,548.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.91 : 13,918.89 = 5,548.78 : x
2. Step 2: Convert to fraction form
   10,085.91/13,918.89 = 5,548.78/x
3. Step 3: Cross multiply
   10,085.91x = 13,918.89 × 5,548.78
4. Step 4: Simplify right side
   10,085.91x = 77,232,875.85
5. Step 5: Solve for x
   x = 77,232,875.85/10,085.91
6. Step 6: Final answer
   x = 7,657.50