Finding the Fourth Proportional to 139,845.33, 209,798.37 and 51,098.70

Step by Step Solution

1. Step 1: Write the proportion equation
   139,845.33 : 209,798.37 = 51,098.70 : x
2. Step 2: Convert to fraction form
   139,845.33/209,798.37 = 51,098.70/x
3. Step 3: Cross multiply
   139,845.33x = 209,798.37 × 51,098.70
4. Step 4: Simplify right side
   139,845.33x = 10,720,423,969.12
5. Step 5: Solve for x
   x = 10,720,423,969.12/139,845.33
6. Step 6: Final answer
   x = 76,659.15