Finding the Fourth Proportional to 91,061.93, 136,592.57 and 42,370.40

Step by Step Solution

1. Step 1: Write the proportion equation
   91,061.93 : 136,592.57 = 42,370.40 : x
2. Step 2: Convert to fraction form
   91,061.93/136,592.57 = 42,370.40/x
3. Step 3: Cross multiply
   91,061.93x = 136,592.57 × 42,370.40
4. Step 4: Simplify right side
   91,061.93x = 5,787,481,827.93
5. Step 5: Solve for x
   x = 5,787,481,827.93/91,061.93
6. Step 6: Final answer
   x = 63,555.45