Finding the Fourth Proportional to 56,426, 77,867.89 and 31,275.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,426 : 77,867.89 = 31,275.50 : x
2. Step 2: Convert to fraction form
   56,426/77,867.89 = 31,275.50/x
3. Step 3: Cross multiply
   56,426x = 77,867.89 × 31,275.50
4. Step 4: Simplify right side
   56,426x = 2,435,357,193.70
5. Step 5: Solve for x
   x = 2,435,357,193.70/56,426
6. Step 6: Final answer
   x = 43,160.20