Finding the Fourth Proportional to 103,640.06, 155,462.72 and 77,510.68

Step by Step Solution

1. Step 1: Write the proportion equation
   103,640.06 : 155,462.72 = 77,510.68 : x
2. Step 2: Convert to fraction form
   103,640.06/155,462.72 = 77,510.68/x
3. Step 3: Cross multiply
   103,640.06x = 155,462.72 × 77,510.68
4. Step 4: Simplify right side
   103,640.06x = 12,050,021,141.85
5. Step 5: Solve for x
   x = 12,050,021,141.85/103,640.06
6. Step 6: Final answer
   x = 116,267.99