Finding the Fourth Proportional to 76,136.58, 105,061.91 and 42,145.11

Step by Step Solution

1. Step 1: Write the proportion equation
   76,136.58 : 105,061.91 = 42,145.11 : x
2. Step 2: Convert to fraction form
   76,136.58/105,061.91 = 42,145.11/x
3. Step 3: Cross multiply
   76,136.58x = 105,061.91 × 42,145.11
4. Step 4: Simplify right side
   76,136.58x = 4,427,845,543.03
5. Step 5: Solve for x
   x = 4,427,845,543.03/76,136.58
6. Step 6: Final answer
   x = 58,156.61