Finding the Fourth Proportional to 78,298.38, 108,098.55 and 51,485.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,298.38 : 108,098.55 = 51,485.76 : x
2. Step 2: Convert to fraction form
   78,298.38/108,098.55 = 51,485.76/x
3. Step 3: Cross multiply
   78,298.38x = 108,098.55 × 51,485.76
4. Step 4: Simplify right side
   78,298.38x = 5,565,536,001.65
5. Step 5: Solve for x
   x = 5,565,536,001.65/78,298.38
6. Step 6: Final answer
   x = 71,081.11