Finding the Fourth Proportional to 72,870.76, 100,556.58 and 43,057

Step by Step Solution

1. Step 1: Write the proportion equation
   72,870.76 : 100,556.58 = 43,057 : x
2. Step 2: Convert to fraction form
   72,870.76/100,556.58 = 43,057/x
3. Step 3: Cross multiply
   72,870.76x = 100,556.58 × 43,057
4. Step 4: Simplify right side
   72,870.76x = 4,329,664,665.06
5. Step 5: Solve for x
   x = 4,329,664,665.06/72,870.76
6. Step 6: Final answer
   x = 59,415.67