Finding the Fourth Proportional to 56,834, 78,430.92 and 31,685.12

Step by Step Solution

1. Step 1: Write the proportion equation
   56,834 : 78,430.92 = 31,685.12 : x
2. Step 2: Convert to fraction form
   56,834/78,430.92 = 31,685.12/x
3. Step 3: Cross multiply
   56,834x = 78,430.92 × 31,685.12
4. Step 4: Simplify right side
   56,834x = 2,485,093,111.91
5. Step 5: Solve for x
   x = 2,485,093,111.91/56,834
6. Step 6: Final answer
   x = 43,725.47