Finding the Fourth Proportional to 122,851, 169,536.30 and 78,199.48

Step by Step Solution

1. Step 1: Write the proportion equation
   122,851 : 169,536.30 = 78,199.48 : x
2. Step 2: Convert to fraction form
   122,851/169,536.30 = 78,199.48/x
3. Step 3: Cross multiply
   122,851x = 169,536.30 × 78,199.48
4. Step 4: Simplify right side
   122,851x = 13,257,650,501.12
5. Step 5: Solve for x
   x = 13,257,650,501.12/122,851
6. Step 6: Final answer
   x = 107,916.50