Finding the Fourth Proportional to 68,128.72, 94,030.68 and 38,320.72

Step by Step Solution

1. Step 1: Write the proportion equation
   68,128.72 : 94,030.68 = 38,320.72 : x
2. Step 2: Convert to fraction form
   68,128.72/94,030.68 = 38,320.72/x
3. Step 3: Cross multiply
   68,128.72x = 94,030.68 × 38,320.72
4. Step 4: Simplify right side
   68,128.72x = 3,603,323,359.69
5. Step 5: Solve for x
   x = 3,603,323,359.69/68,128.72
6. Step 6: Final answer
   x = 52,889.93