Finding the Fourth Proportional to 91,060.43, 136,590.32 and 42,368.90

Step by Step Solution

1. Step 1: Write the proportion equation
   91,060.43 : 136,590.32 = 42,368.90 : x
2. Step 2: Convert to fraction form
   91,060.43/136,590.32 = 42,368.90/x
3. Step 3: Cross multiply
   91,060.43x = 136,590.32 × 42,368.90
4. Step 4: Simplify right side
   91,060.43x = 5,787,181,032.02
5. Step 5: Solve for x
   x = 5,787,181,032.02/91,060.43
6. Step 6: Final answer
   x = 63,553.20