Finding the Fourth Proportional to 1,187,978.40, 1,783,488.24 and 1,020,569.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,187,978.40 : 1,783,488.24 = 1,020,569.76 : x
2. Step 2: Convert to fraction form
   1,187,978.40/1,783,488.24 = 1,020,569.76/x
3. Step 3: Cross multiply
   1,187,978.40x = 1,783,488.24 × 1,020,569.76
4. Step 4: Simplify right side
   1,187,978.40x = 1,820,174,165,059.62
5. Step 5: Solve for x
   x = 1,820,174,165,059.62/1,187,978.40
6. Step 6: Final answer
   x = 1,532,160.99