Finding the Fourth Proportional to 89,381.72, 133,868.34 and 42,667.40

Step by Step Solution

1. Step 1: Write the proportion equation
   89,381.72 : 133,868.34 = 42,667.40 : x
2. Step 2: Convert to fraction form
   89,381.72/133,868.34 = 42,667.40/x
3. Step 3: Cross multiply
   89,381.72x = 133,868.34 × 42,667.40
4. Step 4: Simplify right side
   89,381.72x = 5,711,814,010.12
5. Step 5: Solve for x
   x = 5,711,814,010.12/89,381.72
6. Step 6: Final answer
   x = 63,903.60