Finding the Fourth Proportional to 139,749.53, 209,627.73 and 51,003

Step by Step Solution

1. Step 1: Write the proportion equation
   139,749.53 : 209,627.73 = 51,003 : x
2. Step 2: Convert to fraction form
   139,749.53/209,627.73 = 51,003/x
3. Step 3: Cross multiply
   139,749.53x = 209,627.73 × 51,003
4. Step 4: Simplify right side
   139,749.53x = 10,691,643,113.19
5. Step 5: Solve for x
   x = 10,691,643,113.19/139,749.53
6. Step 6: Final answer
   x = 76,505.76