Finding the Fourth Proportional to 78,172.92, 107,878.98 and 42,362.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,172.92 : 107,878.98 = 42,362.99 : x
2. Step 2: Convert to fraction form
   78,172.92/107,878.98 = 42,362.99/x
3. Step 3: Cross multiply
   78,172.92x = 107,878.98 × 42,362.99
4. Step 4: Simplify right side
   78,172.92x = 4,570,075,611.56
5. Step 5: Solve for x
   x = 4,570,075,611.56/78,172.92
6. Step 6: Final answer
   x = 58,461.11