Finding the Fourth Proportional to 269,139,123.78, 371,412,153.54 and 145,379,855.58

Step by Step Solution

1. Step 1: Write the proportion equation
   269,139,123.78 : 371,412,153.54 = 145,379,855.58 : x
2. Step 2: Convert to fraction form
   269,139,123.78/371,412,153.54 = 145,379,855.58/x
3. Step 3: Cross multiply
   269,139,123.78x = 371,412,153.54 × 145,379,855.58
4. Step 4: Simplify right side
   269,139,123.78x = 53,995,845,242,301,992
5. Step 5: Solve for x
   x = 53,995,845,242,301,992/269,139,123.78
6. Step 6: Final answer
   x = 200,624,288.60