Finding the Fourth Proportional to 76,476.92, 105,534.56 and 42,487.60

Step by Step Solution

1. Step 1: Write the proportion equation
   76,476.92 : 105,534.56 = 42,487.60 : x
2. Step 2: Convert to fraction form
   76,476.92/105,534.56 = 42,487.60/x
3. Step 3: Cross multiply
   76,476.92x = 105,534.56 × 42,487.60
4. Step 4: Simplify right side
   76,476.92x = 4,483,910,171.46
5. Step 5: Solve for x
   x = 4,483,910,171.46/76,476.92
6. Step 6: Final answer
   x = 58,630.89