Finding the Fourth Proportional to 1,994,131.89, 2,990,570.42 and 645,981.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,994,131.89 : 2,990,570.42 = 645,981.71 : x
2. Step 2: Convert to fraction form
   1,994,131.89/2,990,570.42 = 645,981.71/x
3. Step 3: Cross multiply
   1,994,131.89x = 2,990,570.42 × 645,981.71
4. Step 4: Simplify right side
   1,994,131.89x = 1,931,853,791,663.76
5. Step 5: Solve for x
   x = 1,931,853,791,663.76/1,994,131.89
6. Step 6: Final answer
   x = 968,769.32