Finding the Fourth Proportional to 367,926,294.89, 507,735,954.50 and 209,156,426.25

Step by Step Solution

1. Step 1: Write the proportion equation
   367,926,294.89 : 507,735,954.50 = 209,156,426.25 : x
2. Step 2: Convert to fraction form
   367,926,294.89/507,735,954.50 = 209,156,426.25/x
3. Step 3: Cross multiply
   367,926,294.89x = 507,735,954.50 × 209,156,426.25
4. Step 4: Simplify right side
   367,926,294.89x = 106,196,237,720,806,832
5. Step 5: Solve for x
   x = 106,196,237,720,806,832/367,926,294.89
6. Step 6: Final answer
   x = 288,634,542.29