Finding the Fourth Proportional to 56,881, 78,495.78 and 31,730.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,881 : 78,495.78 = 31,730.50 : x
2. Step 2: Convert to fraction form
   56,881/78,495.78 = 31,730.50/x
3. Step 3: Cross multiply
   56,881x = 78,495.78 × 31,730.50
4. Step 4: Simplify right side
   56,881x = 2,490,710,347.29
5. Step 5: Solve for x
   x = 2,490,710,347.29/56,881
6. Step 6: Final answer
   x = 43,788.09