Finding the Fourth Proportional to 13,077.50, 17,977.43 and 11,253.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,077.50 : 17,977.43 = 11,253.89 : x
2. Step 2: Convert to fraction form
   13,077.50/17,977.43 = 11,253.89/x
3. Step 3: Cross multiply
   13,077.50x = 17,977.43 × 11,253.89
4. Step 4: Simplify right side
   13,077.50x = 202,316,092.78
5. Step 5: Solve for x
   x = 202,316,092.78/13,077.50
6. Step 6: Final answer
   x = 15,470.55