Finding the Fourth Proportional to 1,139,901.52, 1,573,016.84 and 623,652.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,901.52 : 1,573,016.84 = 623,652.88 : x
2. Step 2: Convert to fraction form
   1,139,901.52/1,573,016.84 = 623,652.88/x
3. Step 3: Cross multiply
   1,139,901.52x = 1,573,016.84 × 623,652.88
4. Step 4: Simplify right side
   1,139,901.52x = 981,016,482,554.50
5. Step 5: Solve for x
   x = 981,016,482,554.50/1,139,901.52
6. Step 6: Final answer
   x = 860,615.12