Finding the Fourth Proportional to 78,141.65, 107,722.44 and 51,237.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,141.65 : 107,722.44 = 51,237.50 : x
2. Step 2: Convert to fraction form
   78,141.65/107,722.44 = 51,237.50/x
3. Step 3: Cross multiply
   78,141.65x = 107,722.44 × 51,237.50
4. Step 4: Simplify right side
   78,141.65x = 5,519,427,980.89
5. Step 5: Solve for x
   x = 5,519,427,980.89/78,141.65
6. Step 6: Final answer
   x = 70,633.63