Finding the Fourth Proportional to 28,302.06, 42,432.76 and 13,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,302.06 : 42,432.76 = 13,300.72 : x
2. Step 2: Convert to fraction form
   28,302.06/42,432.76 = 13,300.72/x
3. Step 3: Cross multiply
   28,302.06x = 42,432.76 × 13,300.72
4. Step 4: Simplify right side
   28,302.06x = 564,386,259.59
5. Step 5: Solve for x
   x = 564,386,259.59/28,302.06
6. Step 6: Final answer
   x = 19,941.53