Finding the Fourth Proportional to 71,399.65, 107,121.86 and 42,967.63

Step by Step Solution

1. Step 1: Write the proportion equation
   71,399.65 : 107,121.86 = 42,967.63 : x
2. Step 2: Convert to fraction form
   71,399.65/107,121.86 = 42,967.63/x
3. Step 3: Cross multiply
   71,399.65x = 107,121.86 × 42,967.63
4. Step 4: Simplify right side
   71,399.65x = 4,602,772,385.43
5. Step 5: Solve for x
   x = 4,602,772,385.43/71,399.65
6. Step 6: Final answer
   x = 64,464.91