Finding the Fourth Proportional to 17,359.47, 26,011.89 and 13,420.35

Step by Step Solution

1. Step 1: Write the proportion equation
   17,359.47 : 26,011.89 = 13,420.35 : x
2. Step 2: Convert to fraction form
   17,359.47/26,011.89 = 13,420.35/x
3. Step 3: Cross multiply
   17,359.47x = 26,011.89 × 13,420.35
4. Step 4: Simplify right side
   17,359.47x = 349,088,667.96
5. Step 5: Solve for x
   x = 349,088,667.96/17,359.47
6. Step 6: Final answer
   x = 20,109.41