Finding the Fourth Proportional to 47,388.84, 71,099.58 and 21,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   47,388.84 : 71,099.58 = 21,111.72 : x
2. Step 2: Convert to fraction form
   47,388.84/71,099.58 = 21,111.72/x
3. Step 3: Cross multiply
   47,388.84x = 71,099.58 × 21,111.72
4. Step 4: Simplify right side
   47,388.84x = 1,501,034,425.08
5. Step 5: Solve for x
   x = 1,501,034,425.08/47,388.84
6. Step 6: Final answer
   x = 31,674.85