Finding the Fourth Proportional to 70,890.50, 106,354.20 and 26,520.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,890.50 : 106,354.20 = 26,520.72 : x
2. Step 2: Convert to fraction form
   70,890.50/106,354.20 = 26,520.72/x
3. Step 3: Cross multiply
   70,890.50x = 106,354.20 × 26,520.72
4. Step 4: Simplify right side
   70,890.50x = 2,820,589,959.02
5. Step 5: Solve for x
   x = 2,820,589,959.02/70,890.50
6. Step 6: Final answer
   x = 39,787.98