Finding the Fourth Proportional to 17,739.71, 26,612.28 and 5,258.42

Step by Step Solution

1. Step 1: Write the proportion equation
   17,739.71 : 26,612.28 = 5,258.42 : x
2. Step 2: Convert to fraction form
   17,739.71/26,612.28 = 5,258.42/x
3. Step 3: Cross multiply
   17,739.71x = 26,612.28 × 5,258.42
4. Step 4: Simplify right side
   17,739.71x = 139,938,412.34
5. Step 5: Solve for x
   x = 139,938,412.34/17,739.71
6. Step 6: Final answer
   x = 7,888.43