Finding the Fourth Proportional to 76,393.48, 105,420.98 and 42,401.88

Step by Step Solution

1. Step 1: Write the proportion equation
   76,393.48 : 105,420.98 = 42,401.88 : x
2. Step 2: Convert to fraction form
   76,393.48/105,420.98 = 42,401.88/x
3. Step 3: Cross multiply
   76,393.48x = 105,420.98 × 42,401.88
4. Step 4: Simplify right side
   76,393.48x = 4,470,047,849.45
5. Step 5: Solve for x
   x = 4,470,047,849.45/76,393.48
6. Step 6: Final answer
   x = 58,513.48