Finding the Fourth Proportional to 380,060.71, 524,483.84 and 207,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   380,060.71 : 524,483.84 = 207,978.72 : x
2. Step 2: Convert to fraction form
   380,060.71/524,483.84 = 207,978.72/x
3. Step 3: Cross multiply
   380,060.71x = 524,483.84 × 207,978.72
4. Step 4: Simplify right side
   380,060.71x = 109,081,477,703.89
5. Step 5: Solve for x
   x = 109,081,477,703.89/380,060.71
6. Step 6: Final answer
   x = 287,010.67