Finding the Fourth Proportional to 137,975.69, 206,790.48 and 58,997.21

Step by Step Solution

1. Step 1: Write the proportion equation
   137,975.69 : 206,790.48 = 58,997.21 : x
2. Step 2: Convert to fraction form
   137,975.69/206,790.48 = 58,997.21/x
3. Step 3: Cross multiply
   137,975.69x = 206,790.48 × 58,997.21
4. Step 4: Simplify right side
   137,975.69x = 12,200,061,374.56
5. Step 5: Solve for x
   x = 12,200,061,374.56/137,975.69
6. Step 6: Final answer
   x = 88,421.82