Finding the Fourth Proportional to 187,978.17, 259,426.27 and 103,111.63

Step by Step Solution

1. Step 1: Write the proportion equation
   187,978.17 : 259,426.27 = 103,111.63 : x
2. Step 2: Convert to fraction form
   187,978.17/259,426.27 = 103,111.63/x
3. Step 3: Cross multiply
   187,978.17x = 259,426.27 × 103,111.63
4. Step 4: Simplify right side
   187,978.17x = 26,749,865,564.52
5. Step 5: Solve for x
   x = 26,749,865,564.52/187,978.17
6. Step 6: Final answer
   x = 142,303.05