Finding the Fourth Proportional to 139,506.30, 209,256.71 and 46,012.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,506.30 : 209,256.71 = 46,012.05 : x
2. Step 2: Convert to fraction form
   139,506.30/209,256.71 = 46,012.05/x
3. Step 3: Cross multiply
   139,506.30x = 209,256.71 × 46,012.05
4. Step 4: Simplify right side
   139,506.30x = 9,628,329,973.30
5. Step 5: Solve for x
   x = 9,628,329,973.30/139,506.30
6. Step 6: Final answer
   x = 69,017.17