Finding the Fourth Proportional to 42,446.88, 58,554.56 and 28,830.08

Step by Step Solution

1. Step 1: Write the proportion equation
   42,446.88 : 58,554.56 = 28,830.08 : x
2. Step 2: Convert to fraction form
   42,446.88/58,554.56 = 28,830.08/x
3. Step 3: Cross multiply
   42,446.88x = 58,554.56 × 28,830.08
4. Step 4: Simplify right side
   42,446.88x = 1,688,132,649.16
5. Step 5: Solve for x
   x = 1,688,132,649.16/42,446.88
6. Step 6: Final answer
   x = 39,770.48