Finding the Fourth Proportional to 380,561.89, 525,176.06 and 208,476.10

Step by Step Solution

1. Step 1: Write the proportion equation
   380,561.89 : 525,176.06 = 208,476.10 : x
2. Step 2: Convert to fraction form
   380,561.89/525,176.06 = 208,476.10/x
3. Step 3: Cross multiply
   380,561.89x = 525,176.06 × 208,476.10
4. Step 4: Simplify right side
   380,561.89x = 109,486,656,802.17
5. Step 5: Solve for x
   x = 109,486,656,802.17/380,561.89
6. Step 6: Final answer
   x = 287,697.38