Finding the Fourth Proportional to 56,837.84, 78,436.72 and 31,345.18

Step by Step Solution

1. Step 1: Write the proportion equation
   56,837.84 : 78,436.72 = 31,345.18 : x
2. Step 2: Convert to fraction form
   56,837.84/78,436.72 = 31,345.18/x
3. Step 3: Cross multiply
   56,837.84x = 78,436.72 × 31,345.18
4. Step 4: Simplify right side
   56,837.84x = 2,458,612,950.10
5. Step 5: Solve for x
   x = 2,458,612,950.10/56,837.84
6. Step 6: Final answer
   x = 43,256.63