Finding the Fourth Proportional to 1,191,061.89, 1,643,675.82 and 647,197.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191,061.89 : 1,643,675.82 = 647,197.67 : x
2. Step 2: Convert to fraction form
   1,191,061.89/1,643,675.82 = 647,197.67/x
3. Step 3: Cross multiply
   1,191,061.89x = 1,643,675.82 × 647,197.67
4. Step 4: Simplify right side
   1,191,061.89x = 1,063,783,160,939.34
5. Step 5: Solve for x
   x = 1,063,783,160,939.34/1,191,061.89
6. Step 6: Final answer
   x = 893,138.44