Finding the Fourth Proportional to 136,807.56, 188,784.72 and 80,208

Step by Step Solution

1. Step 1: Write the proportion equation
   136,807.56 : 188,784.72 = 80,208 : x
2. Step 2: Convert to fraction form
   136,807.56/188,784.72 = 80,208/x
3. Step 3: Cross multiply
   136,807.56x = 188,784.72 × 80,208
4. Step 4: Simplify right side
   136,807.56x = 15,142,044,821.76
5. Step 5: Solve for x
   x = 15,142,044,821.76/136,807.56
6. Step 6: Final answer
   x = 110,681.35