Finding the Fourth Proportional to 377,931.61, 521,545.59 and 208,165.72

Step by Step Solution

1. Step 1: Write the proportion equation
   377,931.61 : 521,545.59 = 208,165.72 : x
2. Step 2: Convert to fraction form
   377,931.61/521,545.59 = 208,165.72/x
3. Step 3: Cross multiply
   377,931.61x = 521,545.59 × 208,165.72
4. Step 4: Simplify right side
   377,931.61x = 108,567,913,255.18
5. Step 5: Solve for x
   x = 108,567,913,255.18/377,931.61
6. Step 6: Final answer
   x = 287,268.68