Finding the Fourth Proportional to 9,387.77, 12,953.55 and 5,612.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,387.77 : 12,953.55 = 5,612.47 : x
2. Step 2: Convert to fraction form
   9,387.77/12,953.55 = 5,612.47/x
3. Step 3: Cross multiply
   9,387.77x = 12,953.55 × 5,612.47
4. Step 4: Simplify right side
   9,387.77x = 72,701,346.00
5. Step 5: Solve for x
   x = 72,701,346.00/9,387.77
6. Step 6: Final answer
   x = 7,744.26