Finding the Fourth Proportional to 13,359.32, 18,435.76 and 7,390.77

Step by Step Solution

1. Step 1: Write the proportion equation
   13,359.32 : 18,435.76 = 7,390.77 : x
2. Step 2: Convert to fraction form
   13,359.32/18,435.76 = 7,390.77/x
3. Step 3: Cross multiply
   13,359.32x = 18,435.76 × 7,390.77
4. Step 4: Simplify right side
   13,359.32x = 136,254,461.94
5. Step 5: Solve for x
   x = 136,254,461.94/13,359.32
6. Step 6: Final answer
   x = 10,199.21