Finding the Fourth Proportional to 236,280.90, 326,061.72 and 128,853

Step by Step Solution

1. Step 1: Write the proportion equation
   236,280.90 : 326,061.72 = 128,853 : x
2. Step 2: Convert to fraction form
   236,280.90/326,061.72 = 128,853/x
3. Step 3: Cross multiply
   236,280.90x = 326,061.72 × 128,853
4. Step 4: Simplify right side
   236,280.90x = 42,014,030,807.16
5. Step 5: Solve for x
   x = 42,014,030,807.16/236,280.90
6. Step 6: Final answer
   x = 177,813.91