Finding the Fourth Proportional to 66,307.83, 99,482.50 and 42,642.10

Step by Step Solution

1. Step 1: Write the proportion equation
   66,307.83 : 99,482.50 = 42,642.10 : x
2. Step 2: Convert to fraction form
   66,307.83/99,482.50 = 42,642.10/x
3. Step 3: Cross multiply
   66,307.83x = 99,482.50 × 42,642.10
4. Step 4: Simplify right side
   66,307.83x = 4,242,142,731.00
5. Step 5: Solve for x
   x = 4,242,142,731.00/66,307.83
6. Step 6: Final answer
   x = 63,976.50