Finding the Fourth Proportional to 139,072.86, 208,111.14 and 120,417.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,072.86 : 208,111.14 = 120,417.48 : x
2. Step 2: Convert to fraction form
   139,072.86/208,111.14 = 120,417.48/x
3. Step 3: Cross multiply
   139,072.86x = 208,111.14 × 120,417.48
4. Step 4: Simplify right side
   139,072.86x = 25,060,219,038.73
5. Step 5: Solve for x
   x = 25,060,219,038.73/139,072.86
6. Step 6: Final answer
   x = 180,194.89