Finding the Fourth Proportional to 245,886.37, 339,314.06 and 136,988.15

Step by Step Solution

1. Step 1: Write the proportion equation
   245,886.37 : 339,314.06 = 136,988.15 : x
2. Step 2: Convert to fraction form
   245,886.37/339,314.06 = 136,988.15/x
3. Step 3: Cross multiply
   245,886.37x = 339,314.06 × 136,988.15
4. Step 4: Simplify right side
   245,886.37x = 46,482,003,994.29
5. Step 5: Solve for x
   x = 46,482,003,994.29/245,886.37
6. Step 6: Final answer
   x = 189,038.56