Finding the Fourth Proportional to 49,984.49, 74,978.31 and 21,890.10

Step by Step Solution

1. Step 1: Write the proportion equation
   49,984.49 : 74,978.31 = 21,890.10 : x
2. Step 2: Convert to fraction form
   49,984.49/74,978.31 = 21,890.10/x
3. Step 3: Cross multiply
   49,984.49x = 74,978.31 × 21,890.10
4. Step 4: Simplify right side
   49,984.49x = 1,641,282,522.10
5. Step 5: Solve for x
   x = 1,641,282,522.10/49,984.49
6. Step 6: Final answer
   x = 32,835.83