Finding the Fourth Proportional to 19,978.35, 29,959.74 and 7,491.57

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978.35 : 29,959.74 = 7,491.57 : x
2. Step 2: Convert to fraction form
   19,978.35/29,959.74 = 7,491.57/x
3. Step 3: Cross multiply
   19,978.35x = 29,959.74 × 7,491.57
4. Step 4: Simplify right side
   19,978.35x = 224,445,489.39
5. Step 5: Solve for x
   x = 224,445,489.39/19,978.35
6. Step 6: Final answer
   x = 11,234.44