Finding the Fourth Proportional to 1,547.91, 2,136.24 and 988.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,547.91 : 2,136.24 = 988.47 : x
2. Step 2: Convert to fraction form
   1,547.91/2,136.24 = 988.47/x
3. Step 3: Cross multiply
   1,547.91x = 2,136.24 × 988.47
4. Step 4: Simplify right side
   1,547.91x = 2,111,609.15
5. Step 5: Solve for x
   x = 2,111,609.15/1,547.91
6. Step 6: Final answer
   x = 1,364.17