Finding the Fourth Proportional to 56,579.04, 78,081.84 and 31,428

Step by Step Solution

1. Step 1: Write the proportion equation
   56,579.04 : 78,081.84 = 31,428 : x
2. Step 2: Convert to fraction form
   56,579.04/78,081.84 = 31,428/x
3. Step 3: Cross multiply
   56,579.04x = 78,081.84 × 31,428
4. Step 4: Simplify right side
   56,579.04x = 2,453,956,067.52
5. Step 5: Solve for x
   x = 2,453,956,067.52/56,579.04
6. Step 6: Final answer
   x = 43,372.18