Finding the Fourth Proportional to 119,128.61, 178,636.29 and 69,223.10

Step by Step Solution

1. Step 1: Write the proportion equation
   119,128.61 : 178,636.29 = 69,223.10 : x
2. Step 2: Convert to fraction form
   119,128.61/178,636.29 = 69,223.10/x
3. Step 3: Cross multiply
   119,128.61x = 178,636.29 × 69,223.10
4. Step 4: Simplify right side
   119,128.61x = 12,365,756,873.12
5. Step 5: Solve for x
   x = 12,365,756,873.12/119,128.61
6. Step 6: Final answer
   x = 103,801.74