Finding the Fourth Proportional to 71,424.15, 107,158.86 and 42,992.24

Step by Step Solution

1. Step 1: Write the proportion equation
   71,424.15 : 107,158.86 = 42,992.24 : x
2. Step 2: Convert to fraction form
   71,424.15/107,158.86 = 42,992.24/x
3. Step 3: Cross multiply
   71,424.15x = 107,158.86 × 42,992.24
4. Step 4: Simplify right side
   71,424.15x = 4,606,999,427.25
5. Step 5: Solve for x
   x = 4,606,999,427.25/71,424.15
6. Step 6: Final answer
   x = 64,501.98