Finding the Fourth Proportional to 21,980.71, 32,975.12 and 7,190.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,980.71 : 32,975.12 = 7,190.45 : x
2. Step 2: Convert to fraction form
   21,980.71/32,975.12 = 7,190.45/x
3. Step 3: Cross multiply
   21,980.71x = 32,975.12 × 7,190.45
4. Step 4: Simplify right side
   21,980.71x = 237,105,951.60
5. Step 5: Solve for x
   x = 237,105,951.60/21,980.71
6. Step 6: Final answer
   x = 10,787.00