Finding the Fourth Proportional to 258,603,868.72, 357,076,677.81 and 208,208,003.02

Step by Step Solution

1. Step 1: Write the proportion equation
   258,603,868.72 : 357,076,677.81 = 208,208,003.02 : x
2. Step 2: Convert to fraction form
   258,603,868.72/357,076,677.81 = 208,208,003.02/x
3. Step 3: Cross multiply
   258,603,868.72x = 357,076,677.81 × 208,208,003.02
4. Step 4: Simplify right side
   258,603,868.72x = 74,346,222,011,836,048
5. Step 5: Solve for x
   x = 74,346,222,011,836,048/258,603,868.72
6. Step 6: Final answer
   x = 287,490,757.12