Finding the Fourth Proportional to 49,978.18, 74,991.71 and 21,894.40

Step by Step Solution

1. Step 1: Write the proportion equation
   49,978.18 : 74,991.71 = 21,894.40 : x
2. Step 2: Convert to fraction form
   49,978.18/74,991.71 = 21,894.40/x
3. Step 3: Cross multiply
   49,978.18x = 74,991.71 × 21,894.40
4. Step 4: Simplify right side
   49,978.18x = 1,641,898,495.42
5. Step 5: Solve for x
   x = 1,641,898,495.42/49,978.18
6. Step 6: Final answer
   x = 32,852.31