Finding the Fourth Proportional to 56,541.12, 78,025.32 and 31,389

Step by Step Solution

1. Step 1: Write the proportion equation
   56,541.12 : 78,025.32 = 31,389 : x
2. Step 2: Convert to fraction form
   56,541.12/78,025.32 = 31,389/x
3. Step 3: Cross multiply
   56,541.12x = 78,025.32 × 31,389
4. Step 4: Simplify right side
   56,541.12x = 2,449,136,769.48
5. Step 5: Solve for x
   x = 2,449,136,769.48/56,541.12
6. Step 6: Final answer
   x = 43,316.03