Finding the Fourth Proportional to 51,971.78, 71,703.48 and 42,395.02

Step by Step Solution

1. Step 1: Write the proportion equation
   51,971.78 : 71,703.48 = 42,395.02 : x
2. Step 2: Convert to fraction form
   51,971.78/71,703.48 = 42,395.02/x
3. Step 3: Cross multiply
   51,971.78x = 71,703.48 × 42,395.02
4. Step 4: Simplify right side
   51,971.78x = 3,039,870,411.59
5. Step 5: Solve for x
   x = 3,039,870,411.59/51,971.78
6. Step 6: Final answer
   x = 58,490.79