Finding the Fourth Proportional to 139,407.52, 208,993.70 and 60,462.29

Step by Step Solution

1. Step 1: Write the proportion equation
   139,407.52 : 208,993.70 = 60,462.29 : x
2. Step 2: Convert to fraction form
   139,407.52/208,993.70 = 60,462.29/x
3. Step 3: Cross multiply
   139,407.52x = 208,993.70 × 60,462.29
4. Step 4: Simplify right side
   139,407.52x = 12,636,236,803.76
5. Step 5: Solve for x
   x = 12,636,236,803.76/139,407.52
6. Step 6: Final answer
   x = 90,642.43