Finding the Fourth Proportional to 1,445.54, 1,997.10 and 947.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.54 : 1,997.10 = 947.99 : x
2. Step 2: Convert to fraction form
   1,445.54/1,997.10 = 947.99/x
3. Step 3: Cross multiply
   1,445.54x = 1,997.10 × 947.99
4. Step 4: Simplify right side
   1,445.54x = 1,893,220.84
5. Step 5: Solve for x
   x = 1,893,220.84/1,445.54
6. Step 6: Final answer
   x = 1,309.70