Finding the Fourth Proportional to 83,709.72, 115,549.74 and 55,424.52

Step by Step Solution

1. Step 1: Write the proportion equation
   83,709.72 : 115,549.74 = 55,424.52 : x
2. Step 2: Convert to fraction form
   83,709.72/115,549.74 = 55,424.52/x
3. Step 3: Cross multiply
   83,709.72x = 115,549.74 × 55,424.52
4. Step 4: Simplify right side
   83,709.72x = 6,404,288,875.62
5. Step 5: Solve for x
   x = 6,404,288,875.62/83,709.72
6. Step 6: Final answer
   x = 76,505.92