Finding the Fourth Proportional to 90,878.04, 136,250.52 and 42,830.28

Step by Step Solution

1. Step 1: Write the proportion equation
   90,878.04 : 136,250.52 = 42,830.28 : x
2. Step 2: Convert to fraction form
   90,878.04/136,250.52 = 42,830.28/x
3. Step 3: Cross multiply
   90,878.04x = 136,250.52 × 42,830.28
4. Step 4: Simplify right side
   90,878.04x = 5,835,647,921.75
5. Step 5: Solve for x
   x = 5,835,647,921.75/90,878.04
6. Step 6: Final answer
   x = 64,214.06