Finding the Fourth Proportional to 642,111.56, 886,111.74 and 370,178.16

Step by Step Solution

1. Step 1: Write the proportion equation
   642,111.56 : 886,111.74 = 370,178.16 : x
2. Step 2: Convert to fraction form
   642,111.56/886,111.74 = 370,178.16/x
3. Step 3: Cross multiply
   642,111.56x = 886,111.74 × 370,178.16
4. Step 4: Simplify right side
   642,111.56x = 328,019,213,467.60
5. Step 5: Solve for x
   x = 328,019,213,467.60/642,111.56
6. Step 6: Final answer
   x = 510,844.59