Finding the Fourth Proportional to 377,923.98, 521,535.06 and 208,158.10

Step by Step Solution

1. Step 1: Write the proportion equation
   377,923.98 : 521,535.06 = 208,158.10 : x
2. Step 2: Convert to fraction form
   377,923.98/521,535.06 = 208,158.10/x
3. Step 3: Cross multiply
   377,923.98x = 521,535.06 × 208,158.10
4. Step 4: Simplify right side
   377,923.98x = 108,561,748,997.22
5. Step 5: Solve for x
   x = 108,561,748,997.22/377,923.98
6. Step 6: Final answer
   x = 287,258.17