Finding the Fourth Proportional to 76,385.28, 105,412.32 and 42,396.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,385.28 : 105,412.32 = 42,396.12 : x
2. Step 2: Convert to fraction form
   76,385.28/105,412.32 = 42,396.12/x
3. Step 3: Cross multiply
   76,385.28x = 105,412.32 × 42,396.12
4. Step 4: Simplify right side
   76,385.28x = 4,469,073,368.20
5. Step 5: Solve for x
   x = 4,469,073,368.20/76,385.28
6. Step 6: Final answer
   x = 58,507.00