Finding the Fourth Proportional to 139,754.12, 209,608.86 and 46,247.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,754.12 : 209,608.86 = 46,247.72 : x
2. Step 2: Convert to fraction form
   139,754.12/209,608.86 = 46,247.72/x
3. Step 3: Cross multiply
   139,754.12x = 209,608.86 × 46,247.72
4. Step 4: Simplify right side
   139,754.12x = 9,693,931,866.80
5. Step 5: Solve for x
   x = 9,693,931,866.80/139,754.12
6. Step 6: Final answer
   x = 69,364.19