Finding the Fourth Proportional to 42,538,323.60, 63,838,978.20 and 28,156,611.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,538,323.60 : 63,838,978.20 = 28,156,611.60 : x
2. Step 2: Convert to fraction form
   42,538,323.60/63,838,978.20 = 28,156,611.60/x
3. Step 3: Cross multiply
   42,538,323.60x = 63,838,978.20 × 28,156,611.60
4. Step 4: Simplify right side
   42,538,323.60x = 1,797,489,314,118,267.25
5. Step 5: Solve for x
   x = 1,797,489,314,118,267.25/42,538,323.60
6. Step 6: Final answer
   x = 42,255,762.85