Finding the Fourth Proportional to 31,071.90, 42,600.43 and 30,511.99

Step by Step Solution

1. Step 1: Write the proportion equation
   31,071.90 : 42,600.43 = 30,511.99 : x
2. Step 2: Convert to fraction form
   31,071.90/42,600.43 = 30,511.99/x
3. Step 3: Cross multiply
   31,071.90x = 42,600.43 × 30,511.99
4. Step 4: Simplify right side
   31,071.90x = 1,299,823,985.55
5. Step 5: Solve for x
   x = 1,299,823,985.55/31,071.90
6. Step 6: Final answer
   x = 41,832.78