Finding the Fourth Proportional to 103,858.82, 155,814.50 and 28,978.93

Step by Step Solution

1. Step 1: Write the proportion equation
   103,858.82 : 155,814.50 = 28,978.93 : x
2. Step 2: Convert to fraction form
   103,858.82/155,814.50 = 28,978.93/x
3. Step 3: Cross multiply
   103,858.82x = 155,814.50 × 28,978.93
4. Step 4: Simplify right side
   103,858.82x = 4,515,337,755.70
5. Step 5: Solve for x
   x = 4,515,337,755.70/103,858.82
6. Step 6: Final answer
   x = 43,475.73