Finding the Fourth Proportional to 139,785.94, 209,627.88 and 51,013.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,785.94 : 209,627.88 = 51,013.18 : x
2. Step 2: Convert to fraction form
   139,785.94/209,627.88 = 51,013.18/x
3. Step 3: Cross multiply
   139,785.94x = 209,627.88 × 51,013.18
4. Step 4: Simplify right side
   139,785.94x = 10,693,784,775.46
5. Step 5: Solve for x
   x = 10,693,784,775.46/139,785.94
6. Step 6: Final answer
   x = 76,501.15