Finding the Fourth Proportional to 78,123.62, 107,810.73 and 42,313.65

Step by Step Solution

1. Step 1: Write the proportion equation
   78,123.62 : 107,810.73 = 42,313.65 : x
2. Step 2: Convert to fraction form
   78,123.62/107,810.73 = 42,313.65/x
3. Step 3: Cross multiply
   78,123.62x = 107,810.73 × 42,313.65
4. Step 4: Simplify right side
   78,123.62x = 4,561,865,495.46
5. Step 5: Solve for x
   x = 4,561,865,495.46/78,123.62
6. Step 6: Final answer
   x = 58,392.91