Finding the Fourth Proportional to 12,978.58, 19,443.24 and 7,702.44

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978.58 : 19,443.24 = 7,702.44 : x
2. Step 2: Convert to fraction form
   12,978.58/19,443.24 = 7,702.44/x
3. Step 3: Cross multiply
   12,978.58x = 19,443.24 × 7,702.44
4. Step 4: Simplify right side
   12,978.58x = 149,760,389.51
5. Step 5: Solve for x
   x = 149,760,389.51/12,978.58
6. Step 6: Final answer
   x = 11,539.04