Finding the Fourth Proportional to 76,803.42, 105,989.88 and 42,810.96

Step by Step Solution

1. Step 1: Write the proportion equation
   76,803.42 : 105,989.88 = 42,810.96 : x
2. Step 2: Convert to fraction form
   76,803.42/105,989.88 = 42,810.96/x
3. Step 3: Cross multiply
   76,803.42x = 105,989.88 × 42,810.96
4. Step 4: Simplify right side
   76,803.42x = 4,537,528,513.08
5. Step 5: Solve for x
   x = 4,537,528,513.08/76,803.42
6. Step 6: Final answer
   x = 59,079.77