Finding the Fourth Proportional to 1,111,128.74, 1,665,406.52 and 510,830.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111,128.74 : 1,665,406.52 = 510,830.04 : x
2. Step 2: Convert to fraction form
   1,111,128.74/1,665,406.52 = 510,830.04/x
3. Step 3: Cross multiply
   1,111,128.74x = 1,665,406.52 × 510,830.04
4. Step 4: Simplify right side
   1,111,128.74x = 850,739,676,673.71
5. Step 5: Solve for x
   x = 850,739,676,673.71/1,111,128.74
6. Step 6: Final answer
   x = 765,653.56