Finding the Fourth Proportional to 72,435.30, 108,566.55 and 30,315.30

Step by Step Solution

1. Step 1: Write the proportion equation
   72,435.30 : 108,566.55 = 30,315.30 : x
2. Step 2: Convert to fraction form
   72,435.30/108,566.55 = 30,315.30/x
3. Step 3: Cross multiply
   72,435.30x = 108,566.55 × 30,315.30
4. Step 4: Simplify right side
   72,435.30x = 3,291,227,533.22
5. Step 5: Solve for x
   x = 3,291,227,533.22/72,435.30
6. Step 6: Final answer
   x = 45,436.79