Finding the Fourth Proportional to 123,200.79, 184,423.92 and 78,870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   123,200.79 : 184,423.92 = 78,870.30 : x
2. Step 2: Convert to fraction form
   123,200.79/184,423.92 = 78,870.30/x
3. Step 3: Cross multiply
   123,200.79x = 184,423.92 × 78,870.30
4. Step 4: Simplify right side
   123,200.79x = 14,545,569,897.58
5. Step 5: Solve for x
   x = 14,545,569,897.58/123,200.79
6. Step 6: Final answer
   x = 118,063.93