Finding the Fourth Proportional to 9,012.02, 12,436.34 and 4,978.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,012.02 : 12,436.34 = 4,978.62 : x
2. Step 2: Convert to fraction form
   9,012.02/12,436.34 = 4,978.62/x
3. Step 3: Cross multiply
   9,012.02x = 12,436.34 × 4,978.62
4. Step 4: Simplify right side
   9,012.02x = 61,915,811.05
5. Step 5: Solve for x
   x = 61,915,811.05/9,012.02
6. Step 6: Final answer
   x = 6,870.36