Finding the Fourth Proportional to 49,542, 74,322.72 and 21,840

Step by Step Solution

1. Step 1: Write the proportion equation
   49,542 : 74,322.72 = 21,840 : x
2. Step 2: Convert to fraction form
   49,542/74,322.72 = 21,840/x
3. Step 3: Cross multiply
   49,542x = 74,322.72 × 21,840
4. Step 4: Simplify right side
   49,542x = 1,623,208,204.80
5. Step 5: Solve for x
   x = 1,623,208,204.80/49,542
6. Step 6: Final answer
   x = 32,764.28