Finding the Fourth Proportional to 139,044.72, 208,581.72 and 45,557.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,044.72 : 208,581.72 = 45,557.76 : x
2. Step 2: Convert to fraction form
   139,044.72/208,581.72 = 45,557.76/x
3. Step 3: Cross multiply
   139,044.72x = 208,581.72 × 45,557.76
4. Step 4: Simplify right side
   139,044.72x = 9,502,515,940.15
5. Step 5: Solve for x
   x = 9,502,515,940.15/139,044.72
6. Step 6: Final answer
   x = 68,341.44