Finding the Fourth Proportional to 70,828.38, 97,713.87 and 42,142.31

Step by Step Solution

1. Step 1: Write the proportion equation
   70,828.38 : 97,713.87 = 42,142.31 : x
2. Step 2: Convert to fraction form
   70,828.38/97,713.87 = 42,142.31/x
3. Step 3: Cross multiply
   70,828.38x = 97,713.87 × 42,142.31
4. Step 4: Simplify right side
   70,828.38x = 4,117,887,712.27
5. Step 5: Solve for x
   x = 4,117,887,712.27/70,828.38
6. Step 6: Final answer
   x = 58,138.95