Finding the Fourth Proportional to 76,311.29, 105,310.52 and 42,320.25

Step by Step Solution

1. Step 1: Write the proportion equation
   76,311.29 : 105,310.52 = 42,320.25 : x
2. Step 2: Convert to fraction form
   76,311.29/105,310.52 = 42,320.25/x
3. Step 3: Cross multiply
   76,311.29x = 105,310.52 × 42,320.25
4. Step 4: Simplify right side
   76,311.29x = 4,456,767,534.03
5. Step 5: Solve for x
   x = 4,456,767,534.03/76,311.29
6. Step 6: Final answer
   x = 58,402.47