Finding the Fourth Proportional to 76,478.52, 105,541.74 and 42,945.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,478.52 : 105,541.74 = 42,945.72 : x
2. Step 2: Convert to fraction form
   76,478.52/105,541.74 = 42,945.72/x
3. Step 3: Cross multiply
   76,478.52x = 105,541.74 × 42,945.72
4. Step 4: Simplify right side
   76,478.52x = 4,532,566,014.35
5. Step 5: Solve for x
   x = 4,532,566,014.35/76,478.52
6. Step 6: Final answer
   x = 59,265.87