Finding the Fourth Proportional to 99.86, 149.71 and 61.35

Step by Step Solution

1. Step 1: Write the proportion equation
   99.86 : 149.71 = 61.35 : x
2. Step 2: Convert to fraction form
   99.86/149.71 = 61.35/x
3. Step 3: Cross multiply
   99.86x = 149.71 × 61.35
4. Step 4: Simplify right side
   99.86x = 9,184.71
5. Step 5: Solve for x
   x = 9,184.71/99.86
6. Step 6: Final answer
   x = 91.98