Finding the Fourth Proportional to 76,526, 105,615.78 and 42,992

Step by Step Solution

1. Step 1: Write the proportion equation
   76,526 : 105,615.78 = 42,992 : x
2. Step 2: Convert to fraction form
   76,526/105,615.78 = 42,992/x
3. Step 3: Cross multiply
   76,526x = 105,615.78 × 42,992
4. Step 4: Simplify right side
   76,526x = 4,540,633,613.76
5. Step 5: Solve for x
   x = 4,540,633,613.76/76,526
6. Step 6: Final answer
   x = 59,334.52