Finding the Fourth Proportional to 42,000.40, 63,389.50 and 42,000.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,000.40 : 63,389.50 = 42,000.40 : x
2. Step 2: Convert to fraction form
   42,000.40/63,389.50 = 42,000.40/x
3. Step 3: Cross multiply
   42,000.40x = 63,389.50 × 42,000.40
4. Step 4: Simplify right side
   42,000.40x = 2,662,384,355.80
5. Step 5: Solve for x
   x = 2,662,384,355.80/42,000.40
6. Step 6: Final answer
   x = 63,389.50