Finding the Fourth Proportional to 76,528.59, 105,611.24 and 42,538.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,528.59 : 105,611.24 = 42,538.50 : x
2. Step 2: Convert to fraction form
   76,528.59/105,611.24 = 42,538.50/x
3. Step 3: Cross multiply
   76,528.59x = 105,611.24 × 42,538.50
4. Step 4: Simplify right side
   76,528.59x = 4,492,543,732.74
5. Step 5: Solve for x
   x = 4,492,543,732.74/76,528.59
6. Step 6: Final answer
   x = 58,704.12