Finding the Fourth Proportional to 17,276.90, 25,915.47 and 7,407.86

Step by Step Solution

1. Step 1: Write the proportion equation
   17,276.90 : 25,915.47 = 7,407.86 : x
2. Step 2: Convert to fraction form
   17,276.90/25,915.47 = 7,407.86/x
3. Step 3: Cross multiply
   17,276.90x = 25,915.47 × 7,407.86
4. Step 4: Simplify right side
   17,276.90x = 191,978,173.59
5. Step 5: Solve for x
   x = 191,978,173.59/17,276.90
6. Step 6: Final answer
   x = 11,111.84