Finding the Fourth Proportional to 139,867.46, 209,821.86 and 51,100.22

Step by Step Solution

1. Step 1: Write the proportion equation
   139,867.46 : 209,821.86 = 51,100.22 : x
2. Step 2: Convert to fraction form
   139,867.46/209,821.86 = 51,100.22/x
3. Step 3: Cross multiply
   139,867.46x = 209,821.86 × 51,100.22
4. Step 4: Simplify right side
   139,867.46x = 10,721,943,206.81
5. Step 5: Solve for x
   x = 10,721,943,206.81/139,867.46
6. Step 6: Final answer
   x = 76,657.88