Finding the Fourth Proportional to 56,530.79, 78,012.14 and 31,037.61

Step by Step Solution

1. Step 1: Write the proportion equation
   56,530.79 : 78,012.14 = 31,037.61 : x
2. Step 2: Convert to fraction form
   56,530.79/78,012.14 = 31,037.61/x
3. Step 3: Cross multiply
   56,530.79x = 78,012.14 × 31,037.61
4. Step 4: Simplify right side
   56,530.79x = 2,421,309,943.01
5. Step 5: Solve for x
   x = 2,421,309,943.01/56,530.79
6. Step 6: Final answer
   x = 42,831.70