Finding the Fourth Proportional to 6,570.32, 9,858.18 and 5,185.22

Step by Step Solution

1. Step 1: Write the proportion equation
   6,570.32 : 9,858.18 = 5,185.22 : x
2. Step 2: Convert to fraction form
   6,570.32/9,858.18 = 5,185.22/x
3. Step 3: Cross multiply
   6,570.32x = 9,858.18 × 5,185.22
4. Step 4: Simplify right side
   6,570.32x = 51,116,832.10
5. Step 5: Solve for x
   x = 51,116,832.10/6,570.32
6. Step 6: Final answer
   x = 7,779.96