Finding the Fourth Proportional to 139,410.52, 208,998.20 and 60,465.29

Step by Step Solution

1. Step 1: Write the proportion equation
   139,410.52 : 208,998.20 = 60,465.29 : x
2. Step 2: Convert to fraction form
   139,410.52/208,998.20 = 60,465.29/x
3. Step 3: Cross multiply
   139,410.52x = 208,998.20 × 60,465.29
4. Step 4: Simplify right side
   139,410.52x = 12,637,136,772.48
5. Step 5: Solve for x
   x = 12,637,136,772.48/139,410.52
6. Step 6: Final answer
   x = 90,646.94