Finding the Fourth Proportional to 90,077.42, 135,071.43 and 52,646.91

Step by Step Solution

1. Step 1: Write the proportion equation
   90,077.42 : 135,071.43 = 52,646.91 : x
2. Step 2: Convert to fraction form
   90,077.42/135,071.43 = 52,646.91/x
3. Step 3: Cross multiply
   90,077.42x = 135,071.43 × 52,646.91
4. Step 4: Simplify right side
   90,077.42x = 7,111,093,418.78
5. Step 5: Solve for x
   x = 7,111,093,418.78/90,077.42
6. Step 6: Final answer
   x = 78,944.24