Finding the Fourth Proportional to 1,300.01, 1,950.78 and 478.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.01 : 1,950.78 = 478.86 : x
2. Step 2: Convert to fraction form
   1,300.01/1,950.78 = 478.86/x
3. Step 3: Cross multiply
   1,300.01x = 1,950.78 × 478.86
4. Step 4: Simplify right side
   1,300.01x = 934,140.76
5. Step 5: Solve for x
   x = 934,140.76/1,300.01
6. Step 6: Final answer
   x = 718.57