Finding the Fourth Proportional to 384,779,705.98, 530,981,768.59 and 208,563,917.93

Step by Step Solution

1. Step 1: Write the proportion equation
   384,779,705.98 : 530,981,768.59 = 208,563,917.93 : x
2. Step 2: Convert to fraction form
   384,779,705.98/530,981,768.59 = 208,563,917.93/x
3. Step 3: Cross multiply
   384,779,705.98x = 530,981,768.59 × 208,563,917.93
4. Step 4: Simplify right side
   384,779,705.98x = 110,743,638,006,531,008
5. Step 5: Solve for x
   x = 110,743,638,006,531,008/384,779,705.98
6. Step 6: Final answer
   x = 287,810,495.94