Finding the Fourth Proportional to 78,213.02, 107,876.61 and 51,345.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,213.02 : 107,876.61 = 51,345.72 : x
2. Step 2: Convert to fraction form
   78,213.02/107,876.61 = 51,345.72/x
3. Step 3: Cross multiply
   78,213.02x = 107,876.61 × 51,345.72
4. Step 4: Simplify right side
   78,213.02x = 5,539,002,211.61
5. Step 5: Solve for x
   x = 5,539,002,211.61/78,213.02
6. Step 6: Final answer
   x = 70,819.44