Finding the Fourth Proportional to 76,472.89, 105,533.31 and 42,018.34

Step by Step Solution

1. Step 1: Write the proportion equation
   76,472.89 : 105,533.31 = 42,018.34 : x
2. Step 2: Convert to fraction form
   76,472.89/105,533.31 = 42,018.34/x
3. Step 3: Cross multiply
   76,472.89x = 105,533.31 × 42,018.34
4. Step 4: Simplify right side
   76,472.89x = 4,434,334,500.91
5. Step 5: Solve for x
   x = 4,434,334,500.91/76,472.89
6. Step 6: Final answer
   x = 57,985.71