Finding the Fourth Proportional to 9,170.07, 12,654.69 and 4,978.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,170.07 : 12,654.69 = 4,978.32 : x
2. Step 2: Convert to fraction form
   9,170.07/12,654.69 = 4,978.32/x
3. Step 3: Cross multiply
   9,170.07x = 12,654.69 × 4,978.32
4. Step 4: Simplify right side
   9,170.07x = 62,999,096.32
5. Step 5: Solve for x
   x = 62,999,096.32/9,170.07
6. Step 6: Final answer
   x = 6,870.08