Finding the Fourth Proportional to 67,870.34, 101,805.52 and 21,123.24

Step by Step Solution

1. Step 1: Write the proportion equation
   67,870.34 : 101,805.52 = 21,123.24 : x
2. Step 2: Convert to fraction form
   67,870.34/101,805.52 = 21,123.24/x
3. Step 3: Cross multiply
   67,870.34x = 101,805.52 × 21,123.24
4. Step 4: Simplify right side
   67,870.34x = 2,150,462,432.28
5. Step 5: Solve for x
   x = 2,150,462,432.28/67,870.34
6. Step 6: Final answer
   x = 31,684.86