Finding the Fourth Proportional to 75,706.47, 103,718.34 and 72,868.86

Step by Step Solution

1. Step 1: Write the proportion equation
   75,706.47 : 103,718.34 = 72,868.86 : x
2. Step 2: Convert to fraction form
   75,706.47/103,718.34 = 72,868.86/x
3. Step 3: Cross multiply
   75,706.47x = 103,718.34 × 72,868.86
4. Step 4: Simplify right side
   75,706.47x = 7,557,837,196.89
5. Step 5: Solve for x
   x = 7,557,837,196.89/75,706.47
6. Step 6: Final answer
   x = 99,830.80