Finding the Fourth Proportional to 492,070,018.10, 737,601,142.35 and 287,492,789.30

Step by Step Solution

1. Step 1: Write the proportion equation
   492,070,018.10 : 737,601,142.35 = 287,492,789.30 : x
2. Step 2: Convert to fraction form
   492,070,018.10/737,601,142.35 = 287,492,789.30/x
3. Step 3: Cross multiply
   492,070,018.10x = 737,601,142.35 × 287,492,789.30
4. Step 4: Simplify right side
   492,070,018.10x = 212,055,009,805,067,872
5. Step 5: Solve for x
   x = 212,055,009,805,067,872/492,070,018.10
6. Step 6: Final answer
   x = 430,944,788.35