Finding the Fourth Proportional to 7,135.25, 10,706.76 and 2,978.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,135.25 : 10,706.76 = 2,978.15 : x
2. Step 2: Convert to fraction form
   7,135.25/10,706.76 = 2,978.15/x
3. Step 3: Cross multiply
   7,135.25x = 10,706.76 × 2,978.15
4. Step 4: Simplify right side
   7,135.25x = 31,886,283.76
5. Step 5: Solve for x
   x = 31,886,283.76/7,135.25
6. Step 6: Final answer
   x = 4,468.84