Finding the Fourth Proportional to 56,511, 77,987.61 and 31,360.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,511 : 77,987.61 = 31,360.50 : x
2. Step 2: Convert to fraction form
   56,511/77,987.61 = 31,360.50/x
3. Step 3: Cross multiply
   56,511x = 77,987.61 × 31,360.50
4. Step 4: Simplify right side
   56,511x = 2,445,730,443.41
5. Step 5: Solve for x
   x = 2,445,730,443.41/56,511
6. Step 6: Final answer
   x = 43,278.84