Finding the Fourth Proportional to 42,867.72, 59,213.70 and 31,560.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,867.72 : 59,213.70 = 31,560.12 : x
2. Step 2: Convert to fraction form
   42,867.72/59,213.70 = 31,560.12/x
3. Step 3: Cross multiply
   42,867.72x = 59,213.70 × 31,560.12
4. Step 4: Simplify right side
   42,867.72x = 1,868,791,477.64
5. Step 5: Solve for x
   x = 1,868,791,477.64/42,867.72
6. Step 6: Final answer
   x = 43,594.38