Finding the Fourth Proportional to 1,530.76, 2,113.72 and 972.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.76 : 2,113.72 = 972.22 : x
2. Step 2: Convert to fraction form
   1,530.76/2,113.72 = 972.22/x
3. Step 3: Cross multiply
   1,530.76x = 2,113.72 × 972.22
4. Step 4: Simplify right side
   1,530.76x = 2,055,000.86
5. Step 5: Solve for x
   x = 2,055,000.86/1,530.76
6. Step 6: Final answer
   x = 1,342.47