Finding the Fourth Proportional to 61,085.91, 91,572.49 and 42,374.78

Step by Step Solution

1. Step 1: Write the proportion equation
   61,085.91 : 91,572.49 = 42,374.78 : x
2. Step 2: Convert to fraction form
   61,085.91/91,572.49 = 42,374.78/x
3. Step 3: Cross multiply
   61,085.91x = 91,572.49 × 42,374.78
4. Step 4: Simplify right side
   61,085.91x = 3,880,364,056.31
5. Step 5: Solve for x
   x = 3,880,364,056.31/61,085.91
6. Step 6: Final answer
   x = 63,523.06