Finding the Fourth Proportional to 137,580.09, 206,335.50 and 53,311.34

Step by Step Solution

1. Step 1: Write the proportion equation
   137,580.09 : 206,335.50 = 53,311.34 : x
2. Step 2: Convert to fraction form
   137,580.09/206,335.50 = 53,311.34/x
3. Step 3: Cross multiply
   137,580.09x = 206,335.50 × 53,311.34
4. Step 4: Simplify right side
   137,580.09x = 11,000,020,962.89
5. Step 5: Solve for x
   x = 11,000,020,962.89/137,580.09
6. Step 6: Final answer
   x = 79,953.58