Finding the Fourth Proportional to 69,172.56, 103,496.31 and 42,811.92

Step by Step Solution

1. Step 1: Write the proportion equation
   69,172.56 : 103,496.31 = 42,811.92 : x
2. Step 2: Convert to fraction form
   69,172.56/103,496.31 = 42,811.92/x
3. Step 3: Cross multiply
   69,172.56x = 103,496.31 × 42,811.92
4. Step 4: Simplify right side
   69,172.56x = 4,430,875,744.02
5. Step 5: Solve for x
   x = 4,430,875,744.02/69,172.56
6. Step 6: Final answer
   x = 64,055.40