Finding the Fourth Proportional to 1,191,061.21, 1,643,674.85 and 647,196.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191,061.21 : 1,643,674.85 = 647,196.99 : x
2. Step 2: Convert to fraction form
   1,191,061.21/1,643,674.85 = 647,196.99/x
3. Step 3: Cross multiply
   1,191,061.21x = 1,643,674.85 × 647,196.99
4. Step 4: Simplify right side
   1,191,061.21x = 1,063,781,415,458.70
5. Step 5: Solve for x
   x = 1,063,781,415,458.70/1,191,061.21
6. Step 6: Final answer
   x = 893,137.49