Finding the Fourth Proportional to 139,388.47, 209,079.29 and 39,548.81

Step by Step Solution

1. Step 1: Write the proportion equation
   139,388.47 : 209,079.29 = 39,548.81 : x
2. Step 2: Convert to fraction form
   139,388.47/209,079.29 = 39,548.81/x
3. Step 3: Cross multiply
   139,388.47x = 209,079.29 × 39,548.81
4. Step 4: Simplify right side
   139,388.47x = 8,268,837,736.72
5. Step 5: Solve for x
   x = 8,268,837,736.72/139,388.47
6. Step 6: Final answer
   x = 59,322.25