Finding the Fourth Proportional to 105,868,664.61, 146,099,784.61 and 61,211,283.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,868,664.61 : 146,099,784.61 = 61,211,283.72 : x
2. Step 2: Convert to fraction form
   105,868,664.61/146,099,784.61 = 61,211,283.72/x
3. Step 3: Cross multiply
   105,868,664.61x = 146,099,784.61 × 61,211,283.72
4. Step 4: Simplify right side
   105,868,664.61x = 8,942,955,367,193,600
5. Step 5: Solve for x
   x = 8,942,955,367,193,600/105,868,664.61
6. Step 6: Final answer
   x = 84,472,165.58