Finding the Fourth Proportional to 42,135.42, 58,145.72 and 23,015.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,135.42 : 58,145.72 = 23,015.70 : x
2. Step 2: Convert to fraction form
   42,135.42/58,145.72 = 23,015.70/x
3. Step 3: Cross multiply
   42,135.42x = 58,145.72 × 23,015.70
4. Step 4: Simplify right side
   42,135.42x = 1,338,264,650.71
5. Step 5: Solve for x
   x = 1,338,264,650.71/42,135.42
6. Step 6: Final answer
   x = 31,761.04