Finding the Fourth Proportional to 258,891,376.52, 357,270,085.86 and 139,813,958.72

Step by Step Solution

1. Step 1: Write the proportion equation
   258,891,376.52 : 357,270,085.86 = 139,813,958.72 : x
2. Step 2: Convert to fraction form
   258,891,376.52/357,270,085.86 = 139,813,958.72/x
3. Step 3: Cross multiply
   258,891,376.52x = 357,270,085.86 × 139,813,958.72
4. Step 4: Simplify right side
   258,891,376.52x = 49,951,345,036,320,896
5. Step 5: Solve for x
   x = 49,951,345,036,320,896/258,891,376.52
6. Step 6: Final answer
   x = 192,943,255.61