Finding the Fourth Proportional to 99,642.61, 149,499.56 and 42,692.59

Step by Step Solution

1. Step 1: Write the proportion equation
   99,642.61 : 149,499.56 = 42,692.59 : x
2. Step 2: Convert to fraction form
   99,642.61/149,499.56 = 42,692.59/x
3. Step 3: Cross multiply
   99,642.61x = 149,499.56 × 42,692.59
4. Step 4: Simplify right side
   99,642.61x = 6,382,523,420.26
5. Step 5: Solve for x
   x = 6,382,523,420.26/99,642.61
6. Step 6: Final answer
   x = 64,054.16