Finding the Fourth Proportional to 21,109.86, 31,666.62 and 5,527.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,109.86 : 31,666.62 = 5,527.50 : x
2. Step 2: Convert to fraction form
   21,109.86/31,666.62 = 5,527.50/x
3. Step 3: Cross multiply
   21,109.86x = 31,666.62 × 5,527.50
4. Step 4: Simplify right side
   21,109.86x = 175,037,242.05
5. Step 5: Solve for x
   x = 175,037,242.05/21,109.86
6. Step 6: Final answer
   x = 8,291.73