Finding the Fourth Proportional to 78,058.31, 107,720.46 and 42,248.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,058.31 : 107,720.46 = 42,248.32 : x
2. Step 2: Convert to fraction form
   78,058.31/107,720.46 = 42,248.32/x
3. Step 3: Cross multiply
   78,058.31x = 107,720.46 × 42,248.32
4. Step 4: Simplify right side
   78,058.31x = 4,551,008,464.63
5. Step 5: Solve for x
   x = 4,551,008,464.63/78,058.31
6. Step 6: Final answer
   x = 58,302.68