Finding the Fourth Proportional to 326,300,423.31, 489,271,735.89 and 129,364,331.94

Step by Step Solution

1. Step 1: Write the proportion equation
   326,300,423.31 : 489,271,735.89 = 129,364,331.94 : x
2. Step 2: Convert to fraction form
   326,300,423.31/489,271,735.89 = 129,364,331.94/x
3. Step 3: Cross multiply
   326,300,423.31x = 489,271,735.89 × 129,364,331.94
4. Step 4: Simplify right side
   326,300,423.31x = 63,294,311,250,533,968
5. Step 5: Solve for x
   x = 63,294,311,250,533,968/326,300,423.31
6. Step 6: Final answer
   x = 193,975,571.99