Finding the Fourth Proportional to 157,061.18, 216,741.87 and 85,443

Step by Step Solution

1. Step 1: Write the proportion equation
   157,061.18 : 216,741.87 = 85,443 : x
2. Step 2: Convert to fraction form
   157,061.18/216,741.87 = 85,443/x
3. Step 3: Cross multiply
   157,061.18x = 216,741.87 × 85,443
4. Step 4: Simplify right side
   157,061.18x = 18,519,075,598.41
5. Step 5: Solve for x
   x = 18,519,075,598.41/157,061.18
6. Step 6: Final answer
   x = 117,909.95