Finding the Fourth Proportional to 8,970.78, 13,458.33 and 3,127.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,970.78 : 13,458.33 = 3,127.98 : x
2. Step 2: Convert to fraction form
   8,970.78/13,458.33 = 3,127.98/x
3. Step 3: Cross multiply
   8,970.78x = 13,458.33 × 3,127.98
4. Step 4: Simplify right side
   8,970.78x = 42,097,387.07
5. Step 5: Solve for x
   x = 42,097,387.07/8,970.78
6. Step 6: Final answer
   x = 4,692.72