Finding the Fourth Proportional to 78,560.64, 108,411.84 and 42,750.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,560.64 : 108,411.84 = 42,750.72 : x
2. Step 2: Convert to fraction form
   78,560.64/108,411.84 = 42,750.72/x
3. Step 3: Cross multiply
   78,560.64x = 108,411.84 × 42,750.72
4. Step 4: Simplify right side
   78,560.64x = 4,634,684,216.52
5. Step 5: Solve for x
   x = 4,634,684,216.52/78,560.64
6. Step 6: Final answer
   x = 58,994.99