Finding the Fourth Proportional to 150,018.76, 207,025.94 and 85,486.15

Step by Step Solution

1. Step 1: Write the proportion equation
   150,018.76 : 207,025.94 = 85,486.15 : x
2. Step 2: Convert to fraction form
   150,018.76/207,025.94 = 85,486.15/x
3. Step 3: Cross multiply
   150,018.76x = 207,025.94 × 85,486.15
4. Step 4: Simplify right side
   150,018.76x = 17,697,849,098.17
5. Step 5: Solve for x
   x = 17,697,849,098.17/150,018.76
6. Step 6: Final answer
   x = 117,970.91