Finding the Fourth Proportional to 72,090.30, 107,922.51 and 53,245.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,090.30 : 107,922.51 = 53,245.18 : x
2. Step 2: Convert to fraction form
   72,090.30/107,922.51 = 53,245.18/x
3. Step 3: Cross multiply
   72,090.30x = 107,922.51 × 53,245.18
4. Step 4: Simplify right side
   72,090.30x = 5,746,353,471.00
5. Step 5: Solve for x
   x = 5,746,353,471.00/72,090.30
6. Step 6: Final answer
   x = 79,710.49