Finding the Fourth Proportional to 12,970.23, 19,440.77 and 5,578.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,970.23 : 19,440.77 = 5,578.17 : x
2. Step 2: Convert to fraction form
   12,970.23/19,440.77 = 5,578.17/x
3. Step 3: Cross multiply
   12,970.23x = 19,440.77 × 5,578.17
4. Step 4: Simplify right side
   12,970.23x = 108,443,892.10
5. Step 5: Solve for x
   x = 108,443,892.10/12,970.23
6. Step 6: Final answer
   x = 8,360.98