Finding the Fourth Proportional to 1,007,820.06, 1,390,791.42 and 555,111.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007,820.06 : 1,390,791.42 = 555,111.06 : x
2. Step 2: Convert to fraction form
   1,007,820.06/1,390,791.42 = 555,111.06/x
3. Step 3: Cross multiply
   1,007,820.06x = 1,390,791.42 × 555,111.06
4. Step 4: Simplify right side
   1,007,820.06x = 772,043,699,395.11
5. Step 5: Solve for x
   x = 772,043,699,395.11/1,007,820.06
6. Step 6: Final answer
   x = 766,053.12