Finding the Fourth Proportional to 10,064.16, 13,888.20 and 5,587.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,064.16 : 13,888.20 = 5,587.80 : x
2. Step 2: Convert to fraction form
   10,064.16/13,888.20 = 5,587.80/x
3. Step 3: Cross multiply
   10,064.16x = 13,888.20 × 5,587.80
4. Step 4: Simplify right side
   10,064.16x = 77,604,483.96
5. Step 5: Solve for x
   x = 77,604,483.96/10,064.16
6. Step 6: Final answer
   x = 7,710.97