Finding the Fourth Proportional to 120,818.80, 181,128.42 and 53,302.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,818.80 : 181,128.42 = 53,302.72 : x
2. Step 2: Convert to fraction form
   120,818.80/181,128.42 = 53,302.72/x
3. Step 3: Cross multiply
   120,818.80x = 181,128.42 × 53,302.72
4. Step 4: Simplify right side
   120,818.80x = 9,654,637,455.30
5. Step 5: Solve for x
   x = 9,654,637,455.30/120,818.80
6. Step 6: Final answer
   x = 79,910.06