Finding the Fourth Proportional to 56,089.42, 84,109.48 and 21,004.47

Step by Step Solution

1. Step 1: Write the proportion equation
   56,089.42 : 84,109.48 = 21,004.47 : x
2. Step 2: Convert to fraction form
   56,089.42/84,109.48 = 21,004.47/x
3. Step 3: Cross multiply
   56,089.42x = 84,109.48 × 21,004.47
4. Step 4: Simplify right side
   56,089.42x = 1,766,675,049.38
5. Step 5: Solve for x
   x = 1,766,675,049.38/56,089.42
6. Step 6: Final answer
   x = 31,497.47