Finding the Fourth Proportional to 260,548.72, 390,393.78 and 238,759.72

Step by Step Solution

1. Step 1: Write the proportion equation
   260,548.72 : 390,393.78 = 238,759.72 : x
2. Step 2: Convert to fraction form
   260,548.72/390,393.78 = 238,759.72/x
3. Step 3: Cross multiply
   260,548.72x = 390,393.78 × 238,759.72
4. Step 4: Simplify right side
   260,548.72x = 93,210,309,602.54
5. Step 5: Solve for x
   x = 93,210,309,602.54/260,548.72
6. Step 6: Final answer
   x = 357,746.18