Finding the Fourth Proportional to 257,152.78, 385,581.39 and 137,061.82

Step by Step Solution

1. Step 1: Write the proportion equation
   257,152.78 : 385,581.39 = 137,061.82 : x
2. Step 2: Convert to fraction form
   257,152.78/385,581.39 = 137,061.82/x
3. Step 3: Cross multiply
   257,152.78x = 385,581.39 × 137,061.82
4. Step 4: Simplify right side
   257,152.78x = 52,848,487,071.53
5. Step 5: Solve for x
   x = 52,848,487,071.53/257,152.78
6. Step 6: Final answer
   x = 205,513.96