Finding the Fourth Proportional to 139,865.46, 209,818.86 and 51,098.22

Step by Step Solution

1. Step 1: Write the proportion equation
   139,865.46 : 209,818.86 = 51,098.22 : x
2. Step 2: Convert to fraction form
   139,865.46/209,818.86 = 51,098.22/x
3. Step 3: Cross multiply
   139,865.46x = 209,818.86 × 51,098.22
4. Step 4: Simplify right side
   139,865.46x = 10,721,370,268.43
5. Step 5: Solve for x
   x = 10,721,370,268.43/139,865.46
6. Step 6: Final answer
   x = 76,654.88