Finding the Fourth Proportional to 7,327.50, 10,991.31 and 1,780.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,327.50 : 10,991.31 = 1,780.86 : x
2. Step 2: Convert to fraction form
   7,327.50/10,991.31 = 1,780.86/x
3. Step 3: Cross multiply
   7,327.50x = 10,991.31 × 1,780.86
4. Step 4: Simplify right side
   7,327.50x = 19,573,984.33
5. Step 5: Solve for x
   x = 19,573,984.33/7,327.50
6. Step 6: Final answer
   x = 2,671.30