Finding the Fourth Proportional to 152,120.86, 209,970.61 and 106,809.86

Step by Step Solution

1. Step 1: Write the proportion equation
   152,120.86 : 209,970.61 = 106,809.86 : x
2. Step 2: Convert to fraction form
   152,120.86/209,970.61 = 106,809.86/x
3. Step 3: Cross multiply
   152,120.86x = 209,970.61 × 106,809.86
4. Step 4: Simplify right side
   152,120.86x = 22,426,931,716.12
5. Step 5: Solve for x
   x = 22,426,931,716.12/152,120.86
6. Step 6: Final answer
   x = 147,428.38