Finding the Fourth Proportional to 139,305.82, 208,973.31 and 45,818.86

Step by Step Solution

1. Step 1: Write the proportion equation
   139,305.82 : 208,973.31 = 45,818.86 : x
2. Step 2: Convert to fraction form
   139,305.82/208,973.31 = 45,818.86/x
3. Step 3: Cross multiply
   139,305.82x = 208,973.31 × 45,818.86
4. Step 4: Simplify right side
   139,305.82x = 9,574,918,834.63
5. Step 5: Solve for x
   x = 9,574,918,834.63/139,305.82
6. Step 6: Final answer
   x = 68,733.09