Finding the Fourth Proportional to 78,345.77, 108,117.72 and 42,535.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,345.77 : 108,117.72 = 42,535.78 : x
2. Step 2: Convert to fraction form
   78,345.77/108,117.72 = 42,535.78/x
3. Step 3: Cross multiply
   78,345.77x = 108,117.72 × 42,535.78
4. Step 4: Simplify right side
   78,345.77x = 4,598,871,867.46
5. Step 5: Solve for x
   x = 4,598,871,867.46/78,345.77
6. Step 6: Final answer
   x = 58,699.68