Finding the Fourth Proportional to 31,095.59, 42,878.03 and 21,006.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,095.59 : 42,878.03 = 21,006.52 : x
2. Step 2: Convert to fraction form
   31,095.59/42,878.03 = 21,006.52/x
3. Step 3: Cross multiply
   31,095.59x = 42,878.03 × 21,006.52
4. Step 4: Simplify right side
   31,095.59x = 900,718,194.76
5. Step 5: Solve for x
   x = 900,718,194.76/31,095.59
6. Step 6: Final answer
   x = 28,966.11