Finding the Fourth Proportional to 78,154.86, 107,848.58 and 49,857.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,154.86 : 107,848.58 = 49,857.50 : x
2. Step 2: Convert to fraction form
   78,154.86/107,848.58 = 49,857.50/x
3. Step 3: Cross multiply
   78,154.86x = 107,848.58 × 49,857.50
4. Step 4: Simplify right side
   78,154.86x = 5,377,060,577.35
5. Step 5: Solve for x
   x = 5,377,060,577.35/78,154.86
6. Step 6: Final answer
   x = 68,800.08