Finding the Fourth Proportional to 249,196.80, 343,892.08 and 136,019.55

Step by Step Solution

1. Step 1: Write the proportion equation
   249,196.80 : 343,892.08 = 136,019.55 : x
2. Step 2: Convert to fraction form
   249,196.80/343,892.08 = 136,019.55/x
3. Step 3: Cross multiply
   249,196.80x = 343,892.08 × 136,019.55
4. Step 4: Simplify right side
   249,196.80x = 46,776,047,429.78
5. Step 5: Solve for x
   x = 46,776,047,429.78/249,196.80
6. Step 6: Final answer
   x = 187,707.25