Finding the Fourth Proportional to 66,136.86, 99,101.59 and 56,235.42

Step by Step Solution

1. Step 1: Write the proportion equation
   66,136.86 : 99,101.59 = 56,235.42 : x
2. Step 2: Convert to fraction form
   66,136.86/99,101.59 = 56,235.42/x
3. Step 3: Cross multiply
   66,136.86x = 99,101.59 × 56,235.42
4. Step 4: Simplify right side
   66,136.86x = 5,573,019,536.32
5. Step 5: Solve for x
   x = 5,573,019,536.32/66,136.86
6. Step 6: Final answer
   x = 84,264.96