Finding the Fourth Proportional to 72,520.45, 108,651.98 and 30,307.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,520.45 : 108,651.98 = 30,307.50 : x
2. Step 2: Convert to fraction form
   72,520.45/108,651.98 = 30,307.50/x
3. Step 3: Cross multiply
   72,520.45x = 108,651.98 × 30,307.50
4. Step 4: Simplify right side
   72,520.45x = 3,292,969,959.62
5. Step 5: Solve for x
   x = 3,292,969,959.62/72,520.45
6. Step 6: Final answer
   x = 45,407.47