Finding the Fourth Proportional to 377,870.04, 521,465.58 and 208,116.72

Step by Step Solution

1. Step 1: Write the proportion equation
   377,870.04 : 521,465.58 = 208,116.72 : x
2. Step 2: Convert to fraction form
   377,870.04/521,465.58 = 208,116.72/x
3. Step 3: Cross multiply
   377,870.04x = 521,465.58 × 208,116.72
4. Step 4: Simplify right side
   377,870.04x = 108,525,706,102.50
5. Step 5: Solve for x
   x = 108,525,706,102.50/377,870.04
6. Step 6: Final answer
   x = 287,203.79