Finding the Fourth Proportional to 72,989.02, 109,428.18 and 30,861.26

Step by Step Solution

1. Step 1: Write the proportion equation
   72,989.02 : 109,428.18 = 30,861.26 : x
2. Step 2: Convert to fraction form
   72,989.02/109,428.18 = 30,861.26/x
3. Step 3: Cross multiply
   72,989.02x = 109,428.18 × 30,861.26
4. Step 4: Simplify right side
   72,989.02x = 3,377,091,514.31
5. Step 5: Solve for x
   x = 3,377,091,514.31/72,989.02
6. Step 6: Final answer
   x = 46,268.49