Finding the Fourth Proportional to 42,038.42, 63,129.04 and 28,088.08

Step by Step Solution

1. Step 1: Write the proportion equation
   42,038.42 : 63,129.04 = 28,088.08 : x
2. Step 2: Convert to fraction form
   42,038.42/63,129.04 = 28,088.08/x
3. Step 3: Cross multiply
   42,038.42x = 63,129.04 × 28,088.08
4. Step 4: Simplify right side
   42,038.42x = 1,773,173,297.80
5. Step 5: Solve for x
   x = 1,773,173,297.80/42,038.42
6. Step 6: Final answer
   x = 42,179.83