Finding the Fourth Proportional to 52,768.96, 79,152.42 and 21,186.16

Step by Step Solution

1. Step 1: Write the proportion equation
   52,768.96 : 79,152.42 = 21,186.16 : x
2. Step 2: Convert to fraction form
   52,768.96/79,152.42 = 21,186.16/x
3. Step 3: Cross multiply
   52,768.96x = 79,152.42 × 21,186.16
4. Step 4: Simplify right side
   52,768.96x = 1,676,935,834.51
5. Step 5: Solve for x
   x = 1,676,935,834.51/52,768.96
6. Step 6: Final answer
   x = 31,778.83