Finding the Fourth Proportional to 21,990.83, 32,976.99 and 7,191.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,990.83 : 32,976.99 = 7,191.59 : x
2. Step 2: Convert to fraction form
   21,990.83/32,976.99 = 7,191.59/x
3. Step 3: Cross multiply
   21,990.83x = 32,976.99 × 7,191.59
4. Step 4: Simplify right side
   21,990.83x = 237,156,826.63
5. Step 5: Solve for x
   x = 237,156,826.63/21,990.83
6. Step 6: Final answer
   x = 10,784.35