Finding the Fourth Proportional to 13,123.10, 19,687.35 and 4,364.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.10 : 19,687.35 = 4,364.30 : x
2. Step 2: Convert to fraction form
   13,123.10/19,687.35 = 4,364.30/x
3. Step 3: Cross multiply
   13,123.10x = 19,687.35 × 4,364.30
4. Step 4: Simplify right side
   13,123.10x = 85,921,501.61
5. Step 5: Solve for x
   x = 85,921,501.61/13,123.10
6. Step 6: Final answer
   x = 6,547.35