Finding the Fourth Proportional to 66,429.63, 91,621.05 and 42,558.53

Step by Step Solution

1. Step 1: Write the proportion equation
   66,429.63 : 91,621.05 = 42,558.53 : x
2. Step 2: Convert to fraction form
   66,429.63/91,621.05 = 42,558.53/x
3. Step 3: Cross multiply
   66,429.63x = 91,621.05 × 42,558.53
4. Step 4: Simplify right side
   66,429.63x = 3,899,256,746.95
5. Step 5: Solve for x
   x = 3,899,256,746.95/66,429.63
6. Step 6: Final answer
   x = 58,697.55