Finding the Fourth Proportional to 8,973.38, 13,460.18 and 3,128.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,973.38 : 13,460.18 = 3,128.63 : x
2. Step 2: Convert to fraction form
   8,973.38/13,460.18 = 3,128.63/x
3. Step 3: Cross multiply
   8,973.38x = 13,460.18 × 3,128.63
4. Step 4: Simplify right side
   8,973.38x = 42,111,840.01
5. Step 5: Solve for x
   x = 42,111,840.01/8,973.38
6. Step 6: Final answer
   x = 4,692.97