Finding the Fourth Proportional to 642,111.33, 886,111.39 and 370,177.92

Step by Step Solution

1. Step 1: Write the proportion equation
   642,111.33 : 886,111.39 = 370,177.92 : x
2. Step 2: Convert to fraction form
   642,111.33/886,111.39 = 370,177.92/x
3. Step 3: Cross multiply
   642,111.33x = 886,111.39 × 370,177.92
4. Step 4: Simplify right side
   642,111.33x = 328,018,871,238.51
5. Step 5: Solve for x
   x = 328,018,871,238.51/642,111.33
6. Step 6: Final answer
   x = 510,844.24