Finding the Fourth Proportional to 992,883.72, 1,478,095.17 and 986,978.76

Step by Step Solution

1. Step 1: Write the proportion equation
   992,883.72 : 1,478,095.17 = 986,978.76 : x
2. Step 2: Convert to fraction form
   992,883.72/1,478,095.17 = 986,978.76/x
3. Step 3: Cross multiply
   992,883.72x = 1,478,095.17 × 986,978.76
4. Step 4: Simplify right side
   992,883.72x = 1,458,848,538,048.59
5. Step 5: Solve for x
   x = 1,458,848,538,048.59/992,883.72
6. Step 6: Final answer
   x = 1,469,304.52