Finding the Fourth Proportional to 191,028.78, 286,603.17 and 78,761.83

Step by Step Solution

1. Step 1: Write the proportion equation
   191,028.78 : 286,603.17 = 78,761.83 : x
2. Step 2: Convert to fraction form
   191,028.78/286,603.17 = 78,761.83/x
3. Step 3: Cross multiply
   191,028.78x = 286,603.17 × 78,761.83
4. Step 4: Simplify right side
   191,028.78x = 22,573,390,806.61
5. Step 5: Solve for x
   x = 22,573,390,806.61/191,028.78
6. Step 6: Final answer
   x = 118,167.49