Finding the Fourth Proportional to 142,099.61, 196,097.47 and 78,437.41

Step by Step Solution

1. Step 1: Write the proportion equation
   142,099.61 : 196,097.47 = 78,437.41 : x
2. Step 2: Convert to fraction form
   142,099.61/196,097.47 = 78,437.41/x
3. Step 3: Cross multiply
   142,099.61x = 196,097.47 × 78,437.41
4. Step 4: Simplify right side
   142,099.61x = 15,381,376,968.02
5. Step 5: Solve for x
   x = 15,381,376,968.02/142,099.61
6. Step 6: Final answer
   x = 108,243.63