Finding the Fourth Proportional to 85,931.69, 128,866.78 and 29,756.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,931.69 : 128,866.78 = 29,756.72 : x
2. Step 2: Convert to fraction form
   85,931.69/128,866.78 = 29,756.72/x
3. Step 3: Cross multiply
   85,931.69x = 128,866.78 × 29,756.72
4. Step 4: Simplify right side
   85,931.69x = 3,834,651,896.64
5. Step 5: Solve for x
   x = 3,834,651,896.64/85,931.69
6. Step 6: Final answer
   x = 44,624.42