Finding the Fourth Proportional to 72,605.31, 108,950.76 and 30,492.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,605.31 : 108,950.76 = 30,492.78 : x
2. Step 2: Convert to fraction form
   72,605.31/108,950.76 = 30,492.78/x
3. Step 3: Cross multiply
   72,605.31x = 108,950.76 × 30,492.78
4. Step 4: Simplify right side
   72,605.31x = 3,322,211,555.51
5. Step 5: Solve for x
   x = 3,322,211,555.51/72,605.31
6. Step 6: Final answer
   x = 45,757.14