Finding the Fourth Proportional to 136,378.72, 204,653.24 and 52,145.96

Step by Step Solution

1. Step 1: Write the proportion equation
   136,378.72 : 204,653.24 = 52,145.96 : x
2. Step 2: Convert to fraction form
   136,378.72/204,653.24 = 52,145.96/x
3. Step 3: Cross multiply
   136,378.72x = 204,653.24 × 52,145.96
4. Step 4: Simplify right side
   136,378.72x = 10,671,839,666.91
5. Step 5: Solve for x
   x = 10,671,839,666.91/136,378.72
6. Step 6: Final answer
   x = 78,251.50