Finding the Fourth Proportional to 139,407.57, 208,993.80 and 60,462.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,407.57 : 208,993.80 = 60,462.34 : x
2. Step 2: Convert to fraction form
   139,407.57/208,993.80 = 60,462.34/x
3. Step 3: Cross multiply
   139,407.57x = 208,993.80 × 60,462.34
4. Step 4: Simplify right side
   139,407.57x = 12,636,253,148.52
5. Step 5: Solve for x
   x = 12,636,253,148.52/139,407.57
6. Step 6: Final answer
   x = 90,642.52