Finding the Fourth Proportional to 72,189.60, 108,211.71 and 30,092.99

Step by Step Solution

1. Step 1: Write the proportion equation
   72,189.60 : 108,211.71 = 30,092.99 : x
2. Step 2: Convert to fraction form
   72,189.60/108,211.71 = 30,092.99/x
3. Step 3: Cross multiply
   72,189.60x = 108,211.71 × 30,092.99
4. Step 4: Simplify right side
   72,189.60x = 3,256,413,906.91
5. Step 5: Solve for x
   x = 3,256,413,906.91/72,189.60
6. Step 6: Final answer
   x = 45,109.18