Finding the Fourth Proportional to 139,045.32, 208,568.16 and 39,204.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,045.32 : 208,568.16 = 39,204.72 : x
2. Step 2: Convert to fraction form
   139,045.32/208,568.16 = 39,204.72/x
3. Step 3: Cross multiply
   139,045.32x = 208,568.16 × 39,204.72
4. Step 4: Simplify right side
   139,045.32x = 8,176,856,313.72
5. Step 5: Solve for x
   x = 8,176,856,313.72/139,045.32
6. Step 6: Final answer
   x = 58,807.13