Finding the Fourth Proportional to 72,911.34, 109,384.63 and 30,768.66

Step by Step Solution

1. Step 1: Write the proportion equation
   72,911.34 : 109,384.63 = 30,768.66 : x
2. Step 2: Convert to fraction form
   72,911.34/109,384.63 = 30,768.66/x
3. Step 3: Cross multiply
   72,911.34x = 109,384.63 × 30,768.66
4. Step 4: Simplify right side
   72,911.34x = 3,365,618,412.77
5. Step 5: Solve for x
   x = 3,365,618,412.77/72,911.34
6. Step 6: Final answer
   x = 46,160.42