Finding the Fourth Proportional to 151,820.53, 209,539.91 and 90,570.76

Step by Step Solution

1. Step 1: Write the proportion equation
   151,820.53 : 209,539.91 = 90,570.76 : x
2. Step 2: Convert to fraction form
   151,820.53/209,539.91 = 90,570.76/x
3. Step 3: Cross multiply
   151,820.53x = 209,539.91 × 90,570.76
4. Step 4: Simplify right side
   151,820.53x = 18,978,188,601.61
5. Step 5: Solve for x
   x = 18,978,188,601.61/151,820.53
6. Step 6: Final answer
   x = 125,004.10