Finding the Fourth Proportional to 28,152.93, 42,182.70 and 19,815.45

Step by Step Solution

1. Step 1: Write the proportion equation
   28,152.93 : 42,182.70 = 19,815.45 : x
2. Step 2: Convert to fraction form
   28,152.93/42,182.70 = 19,815.45/x
3. Step 3: Cross multiply
   28,152.93x = 42,182.70 × 19,815.45
4. Step 4: Simplify right side
   28,152.93x = 835,869,182.72
5. Step 5: Solve for x
   x = 835,869,182.72/28,152.93
6. Step 6: Final answer
   x = 29,690.31