Finding the Fourth Proportional to 56,814.82, 78,407.13 and 31,664.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,814.82 : 78,407.13 = 31,664.50 : x
2. Step 2: Convert to fraction form
   56,814.82/78,407.13 = 31,664.50/x
3. Step 3: Cross multiply
   56,814.82x = 78,407.13 × 31,664.50
4. Step 4: Simplify right side
   56,814.82x = 2,482,722,567.89
5. Step 5: Solve for x
   x = 2,482,722,567.89/56,814.82
6. Step 6: Final answer
   x = 43,698.50