Finding the Fourth Proportional to 67,515.20, 93,173.28 and 42,378.56

Step by Step Solution

1. Step 1: Write the proportion equation
   67,515.20 : 93,173.28 = 42,378.56 : x
2. Step 2: Convert to fraction form
   67,515.20/93,173.28 = 42,378.56/x
3. Step 3: Cross multiply
   67,515.20x = 93,173.28 × 42,378.56
4. Step 4: Simplify right side
   67,515.20x = 3,948,549,436.88
5. Step 5: Solve for x
   x = 3,948,549,436.88/67,515.20
6. Step 6: Final answer
   x = 58,483.86