Finding the Fourth Proportional to 139,445.39, 209,130.55 and 60,541.13

Step by Step Solution

1. Step 1: Write the proportion equation
   139,445.39 : 209,130.55 = 60,541.13 : x
2. Step 2: Convert to fraction form
   139,445.39/209,130.55 = 60,541.13/x
3. Step 3: Cross multiply
   139,445.39x = 209,130.55 × 60,541.13
4. Step 4: Simplify right side
   139,445.39x = 12,660,999,814.52
5. Step 5: Solve for x
   x = 12,660,999,814.52/139,445.39
6. Step 6: Final answer
   x = 90,795.40