Finding the Fourth Proportional to 72,820.10, 109,272.60 and 30,697.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,820.10 : 109,272.60 = 30,697.60 : x
2. Step 2: Convert to fraction form
   72,820.10/109,272.60 = 30,697.60/x
3. Step 3: Cross multiply
   72,820.10x = 109,272.60 × 30,697.60
4. Step 4: Simplify right side
   72,820.10x = 3,354,406,292.58
5. Step 5: Solve for x
   x = 3,354,406,292.58/72,820.10
6. Step 6: Final answer
   x = 46,064.29