Finding the Fourth Proportional to 76,639, 105,771.54 and 43,111.48

Step by Step Solution

1. Step 1: Write the proportion equation
   76,639 : 105,771.54 = 43,111.48 : x
2. Step 2: Convert to fraction form
   76,639/105,771.54 = 43,111.48/x
3. Step 3: Cross multiply
   76,639x = 105,771.54 × 43,111.48
4. Step 4: Simplify right side
   76,639x = 4,559,967,631.28
5. Step 5: Solve for x
   x = 4,559,967,631.28/76,639
6. Step 6: Final answer
   x = 59,499.31