Finding the Fourth Proportional to 76,520.84, 105,598.28 and 42,528.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,520.84 : 105,598.28 = 42,528.78 : x
2. Step 2: Convert to fraction form
   76,520.84/105,598.28 = 42,528.78/x
3. Step 3: Cross multiply
   76,520.84x = 105,598.28 × 42,528.78
4. Step 4: Simplify right side
   76,520.84x = 4,490,966,124.82
5. Step 5: Solve for x
   x = 4,490,966,124.82/76,520.84
6. Step 6: Final answer
   x = 58,689.46