Finding the Fourth Proportional to 77,403.31, 116,156.75 and 28,155.31

Step by Step Solution

1. Step 1: Write the proportion equation
   77,403.31 : 116,156.75 = 28,155.31 : x
2. Step 2: Convert to fraction form
   77,403.31/116,156.75 = 28,155.31/x
3. Step 3: Cross multiply
   77,403.31x = 116,156.75 × 28,155.31
4. Step 4: Simplify right side
   77,403.31x = 3,270,429,164.07
5. Step 5: Solve for x
   x = 3,270,429,164.07/77,403.31
6. Step 6: Final answer
   x = 42,251.80