Finding the Fourth Proportional to 42,157.72, 58,068.60 and 29,388.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,157.72 : 58,068.60 = 29,388.12 : x
2. Step 2: Convert to fraction form
   42,157.72/58,068.60 = 29,388.12/x
3. Step 3: Cross multiply
   42,157.72x = 58,068.60 × 29,388.12
4. Step 4: Simplify right side
   42,157.72x = 1,706,526,985.03
5. Step 5: Solve for x
   x = 1,706,526,985.03/42,157.72
6. Step 6: Final answer
   x = 40,479.58