Finding the Fourth Proportional to 28,109.71, 42,164.52 and 7,333.21

Step by Step Solution

1. Step 1: Write the proportion equation
   28,109.71 : 42,164.52 = 7,333.21 : x
2. Step 2: Convert to fraction form
   28,109.71/42,164.52 = 7,333.21/x
3. Step 3: Cross multiply
   28,109.71x = 42,164.52 × 7,333.21
4. Step 4: Simplify right side
   28,109.71x = 309,201,248.20
5. Step 5: Solve for x
   x = 309,201,248.20/28,109.71
6. Step 6: Final answer
   x = 10,999.80