Finding the Fourth Proportional to 70,432.42, 105,667.01 and 20,511.42

Step by Step Solution

1. Step 1: Write the proportion equation
   70,432.42 : 105,667.01 = 20,511.42 : x
2. Step 2: Convert to fraction form
   70,432.42/105,667.01 = 20,511.42/x
3. Step 3: Cross multiply
   70,432.42x = 105,667.01 × 20,511.42
4. Step 4: Simplify right side
   70,432.42x = 2,167,380,422.25
5. Step 5: Solve for x
   x = 2,167,380,422.25/70,432.42
6. Step 6: Final answer
   x = 30,772.48