Finding the Fourth Proportional to 139,406.57, 208,992.30 and 60,461.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,406.57 : 208,992.30 = 60,461.34 : x
2. Step 2: Convert to fraction form
   139,406.57/208,992.30 = 60,461.34/x
3. Step 3: Cross multiply
   139,406.57x = 208,992.30 × 60,461.34
4. Step 4: Simplify right side
   139,406.57x = 12,635,953,837.33
5. Step 5: Solve for x
   x = 12,635,953,837.33/139,406.57
6. Step 6: Final answer
   x = 90,641.02