Finding the Fourth Proportional to 13,128.31, 19,692.06 and 3,267.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.31 : 19,692.06 = 3,267.58 : x
2. Step 2: Convert to fraction form
   13,128.31/19,692.06 = 3,267.58/x
3. Step 3: Cross multiply
   13,128.31x = 19,692.06 × 3,267.58
4. Step 4: Simplify right side
   13,128.31x = 64,345,381.41
5. Step 5: Solve for x
   x = 64,345,381.41/13,128.31
6. Step 6: Final answer
   x = 4,901.27