Finding the Fourth Proportional to 34,137.81, 51,238.71 and 21,015.81

Step by Step Solution

1. Step 1: Write the proportion equation
   34,137.81 : 51,238.71 = 21,015.81 : x
2. Step 2: Convert to fraction form
   34,137.81/51,238.71 = 21,015.81/x
3. Step 3: Cross multiply
   34,137.81x = 51,238.71 × 21,015.81
4. Step 4: Simplify right side
   34,137.81x = 1,076,822,994.01
5. Step 5: Solve for x
   x = 1,076,822,994.01/34,137.81
6. Step 6: Final answer
   x = 31,543.41