Finding the Fourth Proportional to 71,667.05, 107,518.79 and 42,109.74

Step by Step Solution

1. Step 1: Write the proportion equation
   71,667.05 : 107,518.79 = 42,109.74 : x
2. Step 2: Convert to fraction form
   71,667.05/107,518.79 = 42,109.74/x
3. Step 3: Cross multiply
   71,667.05x = 107,518.79 × 42,109.74
4. Step 4: Simplify right side
   71,667.05x = 4,527,588,397.29
5. Step 5: Solve for x
   x = 4,527,588,397.29/71,667.05
6. Step 6: Final answer
   x = 63,175.32