Finding the Fourth Proportional to 13,320.31, 19,981.55 and 4,435.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,320.31 : 19,981.55 = 4,435.32 : x
2. Step 2: Convert to fraction form
   13,320.31/19,981.55 = 4,435.32/x
3. Step 3: Cross multiply
   13,320.31x = 19,981.55 × 4,435.32
4. Step 4: Simplify right side
   13,320.31x = 88,624,546.17
5. Step 5: Solve for x
   x = 88,624,546.17/13,320.31
6. Step 6: Final answer
   x = 6,653.34