Finding the Fourth Proportional to 78,726.67, 108,641.97 and 42,915.93

Step by Step Solution

1. Step 1: Write the proportion equation
   78,726.67 : 108,641.97 = 42,915.93 : x
2. Step 2: Convert to fraction form
   78,726.67/108,641.97 = 42,915.93/x
3. Step 3: Cross multiply
   78,726.67x = 108,641.97 × 42,915.93
4. Step 4: Simplify right side
   78,726.67x = 4,662,471,179.58
5. Step 5: Solve for x
   x = 4,662,471,179.58/78,726.67
6. Step 6: Final answer
   x = 59,223.53