Finding the Fourth Proportional to 56,626.30, 78,137.50 and 31,128.46

Step by Step Solution

1. Step 1: Write the proportion equation
   56,626.30 : 78,137.50 = 31,128.46 : x
2. Step 2: Convert to fraction form
   56,626.30/78,137.50 = 31,128.46/x
3. Step 3: Cross multiply
   56,626.30x = 78,137.50 × 31,128.46
4. Step 4: Simplify right side
   56,626.30x = 2,432,300,043.25
5. Step 5: Solve for x
   x = 2,432,300,043.25/56,626.30
6. Step 6: Final answer
   x = 42,953.54