Finding the Fourth Proportional to 53,579.10, 73,853.76 and 42,231

Step by Step Solution

1. Step 1: Write the proportion equation
   53,579.10 : 73,853.76 = 42,231 : x
2. Step 2: Convert to fraction form
   53,579.10/73,853.76 = 42,231/x
3. Step 3: Cross multiply
   53,579.10x = 73,853.76 × 42,231
4. Step 4: Simplify right side
   53,579.10x = 3,118,918,138.56
5. Step 5: Solve for x
   x = 3,118,918,138.56/53,579.10
6. Step 6: Final answer
   x = 58,211.47