Finding the Fourth Proportional to 78,353.91, 108,128.83 and 42,543.92

Step by Step Solution

1. Step 1: Write the proportion equation
   78,353.91 : 108,128.83 = 42,543.92 : x
2. Step 2: Convert to fraction form
   78,353.91/108,128.83 = 42,543.92/x
3. Step 3: Cross multiply
   78,353.91x = 108,128.83 × 42,543.92
4. Step 4: Simplify right side
   78,353.91x = 4,600,224,457.18
5. Step 5: Solve for x
   x = 4,600,224,457.18/78,353.91
6. Step 6: Final answer
   x = 58,710.85