Finding the Fourth Proportional to 21,595,764.87, 32,416,061.32 and 12,515,603.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,595,764.87 : 32,416,061.32 = 12,515,603.31 : x
2. Step 2: Convert to fraction form
   21,595,764.87/32,416,061.32 = 12,515,603.31/x
3. Step 3: Cross multiply
   21,595,764.87x = 32,416,061.32 × 12,515,603.31
4. Step 4: Simplify right side
   21,595,764.87x = 405,706,564,353,755
5. Step 5: Solve for x
   x = 405,706,564,353,755/21,595,764.87
6. Step 6: Final answer
   x = 18,786,394.78