Finding the Fourth Proportional to 13,256.89, 19,881.38 and 4,370.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,256.89 : 19,881.38 = 4,370.56 : x
2. Step 2: Convert to fraction form
   13,256.89/19,881.38 = 4,370.56/x
3. Step 3: Cross multiply
   13,256.89x = 19,881.38 × 4,370.56
4. Step 4: Simplify right side
   13,256.89x = 86,892,742.32
5. Step 5: Solve for x
   x = 86,892,742.32/13,256.89
6. Step 6: Final answer
   x = 6,554.53