Finding the Fourth Proportional to 1,987,212.69, 2,980,894.94 and 621,112.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987,212.69 : 2,980,894.94 = 621,112.15 : x
2. Step 2: Convert to fraction form
   1,987,212.69/2,980,894.94 = 621,112.15/x
3. Step 3: Cross multiply
   1,987,212.69x = 2,980,894.94 × 621,112.15
4. Step 4: Simplify right side
   1,987,212.69x = 1,851,470,068,057.25
5. Step 5: Solve for x
   x = 1,851,470,068,057.25/1,987,212.69
6. Step 6: Final answer
   x = 931,691.95